Best Inch Depth Gauges in 2026

Precision at Your Fingertips - The Starrett 827 Edge Finder is the perfect tool for anyone looking for an accurate work location. With its fast, simple design, it's easy to get the job done right every time.

Ideal Use - To locate edges on any surface including flats, straight edges, shoulders and grooves as well as round work such as dowels or center points of circles. Also used to scribe lines on surfaces such as studs or wallboard.

Outstanding Quality - The body and contacts are made of tool steel, hardened, ground and lapped to close tolerances for diameter and concentricity. It has a furnished in attractive, protective case.

Accurate measures tire tread depth gauge tool

Calibrated from 0 to 1 inch in 1/ 32 inch

Red range on bar: 0-3/32; Yellow Range on bar: 3/32 - 6/32; 5. Green Range on bar: 6/32-32/32

Hit the mark every time: With clear and easy-to-read markings, you'll be able to adjust the depth of your router bit and get precise results.

Works with any router: This depth gauge is suitable for use with all types of routers, so you can get accurate measurements no matter what type of router you have.

A must-have tool: Get the perfect depth every time with this must-have router depth gauge tool.

The Cressi Mini-Console PD2 is a small scuba diving console that houses the Mini-Manometer Pressure Gauge and the Analog Depth Gauge.

Mini-depth gauge reads to 70 meters (230 feet). Depth indications spaced out in first 12 meters (40 feet) for precise readings during safety stops. Maximum depth indicator.

Pressure gauge dial is color-coded in red, green and blue for instant readability. Reads pressures up to 350 BAR or 5000 PSI.

Range: 0 to 22" (with included 6 extension rods 1", 2", 3", 4", 5", 6") Resolution: 0.0005"

Super high precision electronic indicator 0-1" Travel, Resolution: .0005" / .01mm / 1/128 inch

Indicator Gauge conforms to AGD standard and Federal Accuracy specifications

Mechanical Round Hour Meter Work Range:AC/DC 6 to 80V

Accumulating Total Running Hours TOT. Max Hours:99999.9H,Resolution 0.1 hour.

The hour meter fits in to a 2" round hole and includes an adjustable retrainer clip so that the meter can be mounted on material up to 9/32 inch thick. Meter depth behind the panel is 1.5 inches

[Size]: diameter range: 2.000"-6.000"; graduation: 0.0005"; depth: 6"; 12 PCS anvils: 1PC 2",1PC 2.2",1PC 2.4",1PC 2.6",1PC 2.8",1PC 3",1PC 3.2",1PC 3.4",1PC 3.6",1PC 3.8",2PCS 4"

[Industrial Professional High Precision Gage]: Bore diameter measurement as deep as 10" enables users to measure the out-of-roundness and taper of cylinders without removing pistons -- critical wear area of the cylinder can be reached with this gauge.

[Packing]: Includes all the necessary spacers, interchangeable extensions and ABS storage case

WIDE APERTURE: The Trend Digital Depth Gauge features a 2 23/64 inch wide aperture to span fence cheeks and bigger router base openings for a variety of woodworking projects.

ACCURATE DIGITAL READOUT: This depth gauge is accurate to 0.003 inch with readout registering in 0.002 inch increments, allowing for precision setting of rebates and grooves on router tables.

MAGNETIC FEET: The magnetic feet hold it to metal surfaces, freeing your hands for adjustments and setting up. The locking option can secure any measurements that needs to be transferred.

CYLINDER COMPRESSION TEST AND DIAGNOSTIC: JIFETOR automotive engine compression tester kit is used for measuring pressure on gasoline engine cylinder quickly and accurately. The gauge readings assist to diagnose if there are following problems: valve sticking, carbon build-up, cracked cylinder head or defective main gasket, poorly seated or worn piston rings, burned or damaged piston. Please refer to the vehicle manufacturer's service instructions or proprietary manual and our manual for detail

WIDE USE OF SMALL ENGINE COMPRESSION TESTER: There are 16" long flexible extension hose with 4 sizes (10mm 12mm 14mm 18mm) selectable brass adapters in the engine compression test kit, widely suitable for most types and depth spark plug well on gasoline petrol gas fuel engine cylinder, which is common in motorcycle, car, ATV, snowmobile, dirtbike, lawn mower, chainsaw etc. Please note, the engine compression gauge is not used for most diesel engine, due to the low pressure range 0-300PSI

UNIVERSAL AUTO CYLINDER PRESSURE TEST GAUGE CONNECTORS: The straight and angled push-on connectors in the cylinder compression tool kit are equipped with rubber tapered tip for easy and quick installation, you just need to push and hold it seal against cylinder head, rather than screw to tighten like 10mm 12mm 14mm 18mm appropriative adapters. These push-on connectors are also perfect for some types and depth spark well, which the appropriative adapters do not fit

【Auto Reads Steel and Aluminum】Coating Paint thickness gauge Designed with dual technology, the non-destructive Coating Thickness Tester takes the guess work out of testing surface coatings by providing automatic recognition for both ferrous and non-ferrous substrates.

【A Useful, Versatile Meter for Many Applications】 Ideal for checking the car painting thickness checker, like used cars paint, powder coating, anodized aluminum, bathroom fittings, bike frames, stadium seats, outdoor sheds, furniture, swing sets, cabinets and lockers, computers, appliances, and toys.

【Automotive perform on used car, save money】 Sometimes body shops do a great job hiding visually everything that couldn’t tell us that the car was involved in a heavy crash. Checking car paint to make sure each panel has about the same thickness of paint on it when buying used cars.

FUNCTIONS: TEST CYLINDER COMPRESSION --- This cylinder compression tester kit is used for testing pressure on gasoline engine cylinder quickly and accurately. The gauge readings assist to diagnose if there are following problems: valve sticking, carbon build-up, cracked cylinder head or defective main gasket, poorly seated or worn piston rings, burned or damaged piston.

APPLICATIONS: GASOLINE ENGINE CYLINDER --- Come with different sizes rotary and push on adapters, widely suitable for most types and depth spark plug well on gasoline petrol gas fuel engine cylinder, which is common in motorcycle, car, truck, lawn mower, ATV and so on. NOT FOR DIESEL ENGINE.

UNIVERSAL: INCLUDE 10 CONNECT ADAPTERS --- 13-in-1 engine tester gauge kit includes 1-piece spring buckle gauge; 5-pieces brass adapters M10, M12, M14, M16, M18 for wide applications; 2-pieces straight and angled push-on connectors for direct testing; 1-piece extra long 8 inches extension straight rod, 1-piece 12 inches M12 extension hose rod and 1-piece 16 inches extension hose for long reach testing. Come with extra 2-piece spark plug testers.

3-In-1 Tool - Depth Gauge, Height Gauge, Thickness Gauge

Super Large LCD Display; On/Off, Zero Set Functions

FUNCTIONS: TEST CYLINDER COMPRESSION --- This cylinder compression tester kit is used for testing pressure on gasoline engine cylinder quickly and accurately. The gauge readings assist to diagnose if there are following problems: valve sticking, carbon build-up, cracked cylinder head or defective main gasket, poorly seated or worn piston rings, burned or damaged piston.

APPLICATIONS: GASOLINE ENGINE CYLINDER --- Come with different sizes rotary and push on adapters, widely suitable for most types and depth spark plug well on gasoline petrol gas fuel engine cylinder, which is common in motorcycle, car, truck, lawn mower, ATV and so on. NOT FOR DIESEL ENGINE.

UNIVERSAL: INCLUDE 9 CONNECT ADAPTERS --- 10-in-1 engine tester gauge kit includes 1-piece spring buckle gauge; 5-pieces brass adapters M10, M12, M14, M16, M18 for wide applications; 2-pieces straight and angled connector for direct testing; extra long 8 inches extension tube and 16 inches extension hose for long reach testing.

✔️Mechanical Hour meter. It can work on any AC110-250V device.

✔️Timing System Including: accumulating total running hours TOT, Max Hours:99999.9H,Resolution 0.1 hour.

✔️The hour meter fits in to a 2" round hole and includes an adjustable retrainer clip so that the meter can be mounted on material up to 9/32 inch thick. Meter depth behind the panel is about 1.77 inches.

6" / 150 MM DEPTH GAUGE METRIC & IMPERIAL STANDARDS - ENGINEERING

This steel depth gauge is used to quickly obtain measurements of holes or grooves by adjusting the rule to the desired depth

This depth gauge consists of a gun metal finished base and a steel rule

Measuring Range:0 to 80mm (0 to 3-1/8" ); Resolution:0.05mm(0.002") ; Accuracy: 0.1mm (0.004")

Two measure mode: relative and absolute measurement

Three measure units: in/mm/fraction(only shows fraction when the number HAS equivalent fraction)

Includes 1" and 2" interchangeable depth bars to extend the rod to 2", 3" or 4".

3-Reading functions: inch, metric, & fractional

Spring loaded movement for easy use

Measurement range of 0 to 1", and resolution of 0.001"

Vernier scale for precise measurements in fine units

Includes measuring 0.157" diameter rod

Inch / Metric Range 2" to 6" diameter

Measures bore to 10" deep

Analog bar display with adjustable rang and tolerance indicators

✔【Cylinder Pressure Gauge Set】 -- Small engine compression tester is made of durable material for long-lasting use. Checing compression of petrol engines quickly and accurately. Diagnose various common engine faults. Widely suitable for most types and depth spark plugs of gasoline engine cylinder, commonly used in motorcycle, car, truck, ATV and other types 2 or 4 stroke etc. Please press it to release pressure before the test is over.

✔【Motorcycle Engine Testing Tools】-- The precision pressure gauge is equipped with quick coupler, resin gauge cover with anti-scratch coating and aluminum protective cover, and build-in check valve with pressure-maintaining function,which makes the tool has a stronger sealing performance and a more accurate readings. Easy to read colored dial with triple scale gauge (0-300 psi, 0-21 kg/cm², 0-20 bar). The release valve allows repeated tests without hose reassembly.

✔【Universal Compatibility】-- There are 4 different sizes of brass adapters with sealed O-ring in the cylinder testing kit for vehicles and motorcycles, meets many practical needs. 45° universal direct shaft & straight universal direct shaft, equipped with rubber cone tip for easy and quick installation, you just need to push and hold it seal against cylinder head; 16.75" rubber extension hose for long reach testing.

MULTI-FUNCTION: It is convenient to measure the angle of the drill bit to ensure the accuracy of drilling, the depth can be measured by flipping, and the height of the table saw blade can be measured

ADJUSTABLE: Loosen the fixing copper screw to quickly adjust the required size, then fix it, and at the same time, it can also complete repeated positioning of the same height

CONVENIENT: Metric and imperial double-sided scale degrees are more convenient

Analog Amp Panel Meter Current Ammeter DC 0-100A+Shunt

Scale Range : DC 100A

Overall Depth(Screw not Included): 3.5cm/ 1.4 inch

Range from 2" to 6". Accuracy: 0.001"

With Carbide tip on measuring plunger

Dial indicator includes jewel bearing, including ABS storage box

This easy-to-use depth and angle gage allows you to accurately measure and mark the outside, inside and sloped angles of a surface

The hardened steel base is grooved on both sides to deliver accurate angles; Permits easy setting of the protractor angle to 30, 45 and 60 degree on both sides

The rule can also be used as a depth gage for measuring small holes and slots

FUNCTIONS: TEST CYLINDER COMPRESSION --- This cylinder compression tester kit is used for testing pressure on gasoline engine cylinder quickly and accurately. The gauge readings assist to diagnose if there are following problems: valve sticking, carbon build-up, cracked cylinder head or defective main gasket, poorly seated or worn piston rings, burned or damaged piston.

APPLICATIONS: GASOLINE ENGINE CYLINDER --- Come with different sizes rotary and push on adapters, widely suitable for most types and depth spark plug well on gasoline petrol gas fuel engine cylinder, which is common in motorcycle, car, truck, lawn mower, ATV and so on. NOT FOR DIESEL ENGINE.

UNIVERSAL: INCLUDE 10 CONNECT ADAPTERS --- 12-in-1 engine tester gauge kit includes 1-piece spring buckle gauge; 5-pieces brass adapters M10, M12, M14, M16, M18 for wide applications; 2-pieces straight and angled push-on connectors for direct testing; 1-piece extra long 8 inches extension straight rod, 1-piece 12 inches M12 extension hose rod and 1-piece 16 inches extension hose for long reach testing. Come with extra 1-piece cylinder stethoscope.

Range 2.000"-6.000" diameter, .0005" graduations, 6" depth

For quick transferable accurate inside measurements

Insulated Grip - Carbide Anvils - Tool weight 6.1 lbs

Measuring Range: 0-1 inch or 0-25.4 mm

Resolution: .0005" / .01 mm

Base Size 2.75 inches by 0.30 inches; Steel probe Head Diameter: 0.080 inches

LCD Display: High-quality electronic depth gage features a large LCD screen which displays in inch/metric/fractions; the electronic display can be easily adjusted for zero setting; spring-loaded and hold measurement button for ease of use

Precision Measurements: Features a 0-16"/406mm range, a resolution of 0.0005"/0.01mm (fractions in 1/64" increments), and travel of 0-1"/25mm

Rod Extensions: Five rods with a diameter of 0.176" that can be connected to reach full capacity

Suitable for tread depth, brake shoe and pad wear

Digital LCD display

Zero setting at any position

【 Metric Scale Display 】 Reading is easy, intuitive and reliable, suitable for various vehicles, motorcycles, etc.

【 High Precision Measurement 】 Brake disc measuring range: 0-60mm, with 0.1mm increments. For precise measurement of disc brake thickness and tyre pattern depth.

【 Accurate Reading 】 Special jaw release mechanism to hold the value you obtain while you measure the thickness of brake disc and removing the tool.