Best Central Tools in 2026

Fits all diesel engines

Range: 1.00"

Graduation: .001"

Precision ground to + .001"

Tough epoxy coating

Convenient hang-up hole

Designed to measure head, block and flywheel straightness

Constructed from high quality heat treated steel

Features an integrated hanging hole

Precision ground to + .001"

Tough epoxy coating

Convenient hang-up hole

Used to determine if the brake drums can safely be machined

Features Inch/Metric scales

Range is 6 inch -22 inch (150 -560mm ), in 1/32 inch (1 mm)graduations

Frictional losses in the gear train may cause a torque loss of 10 to 20 percent

Drive output: 1 inch; drive input: 3/4 inch

Ratio: 4:1

2-6 inch range

bore depth 6 inch

3pc washers and 11 pc Anvils (1 anvil installed in the bore gage probe and 10 pc in case slot)，No product for two slots is correct ！

Range 0.7" to 6" diameter, Measures bore to 10" deep

Super Precision Deep Measuring Bore Gauge

Accuracy: 0.0005" with Crisp Precision Graduations

Super Precision Deep Bore Gauge

Measures bore to 10" deep, Range 2" to 6" diameter

0.0005" precision graduations

Fits all diesel engines

Range: 1.00"

Graduation: .001"

Accurate Measurements: This Bore Gage Features A Dial Indicator With A Graduations Of 0.0005" And A Measuring Depth Of 9.5"

Extended Range: This 2-6" Bore Gage, With A Two-Point Contact System, Is Used For Measuring Hole Diameters And To Detect Geometry Abnormalities. The Carbide-Tipped Anvil Contact Points Provide Extended Wear & Improved Abrasion Resistance

Self-Centering: The Easily Adjustable Bore Gage Is Self-Centering For Fast And Accurate Measurements

[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

Gauge Set Comes In It's Own Carrying Case

Easy To Use/ Easy To Read

Professional Quality

ACCURATE MEASUREMENTS: This bore gage features a dial indicator with a graduations of 0.0005" and a measuring depth of 9.5"

EXTENDED RANGE: This 1.4-6" range bore gage, with a two-point contact system, is used for measuring hole diameters and also to detect geometry abnormalities such as ovality and taper; carbide-tipped anvil contact points provide extended wear and improved abrasion resistance

SELF CENTERING: The easily adjustable bore gauge is self-centering for fast, accurate measurements

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

Size：Range from 2" to 6"（50mm to 160mm）；bore to 150mm (5.9") deep; Accuracy 0.01MM (0.0003")；12 PCS anvils: 1 x 2",1 x 2.2",1 x 2.4",1 x 2.6",1 x 2.8",1 x 3",1 x 3.2",1 x 3.4",1 x 3.6",1 x 3.8",2 x 4".

Industrial Professional High Precision Gage：Bore measurement up to 10" deep enables users to measure cylinder out-of-roundness without removing the piston, for mechanic use.

Accurate and Effective：With Carbide tip on measuring plunger，Two-point contact is used to detect geometric diameter measurement problems such as ovality and taper.making repairs more efficient and hassle-free.

【Wide Applications】 6434 1 in. Dial Indicator Sleeve Height and Counter Bore Gauge is compatible with all diesel engines with sleeved cylinders. Helps quick and easy to measure the cylinder sleeve height, counter bore depth, top dead center, piston-to-deck height, valve protrusion.

【Precise Measurement】 Range: 0-1.00". Graduation: 0.001". Reading: 0-100. Easy readings around entire bore. 4374- Dial Indicator; 4375- Base; 4230- Flat Contact Point; 4378- Pointed Contact Point

【Perfect Design】 Pointed contact for measuring cylinder sleeve height. Flat end contact measures counter-bore depth. Compact and versatile gauge also measures top dead center, piston-to-deck height and valve protrusion. Easy to use, impossible to mess up.

Application – This kit universal fits for all diesel engines. Range: 1.00 inch. Graduations: .001 inch. Reading: 0-100.

Material – It is made of special high quality steel and aluminum alloy, hard coated crystal dial face for scratch & corrosion resistance, which reduces the weight of the product and has strong corrosion resistance, wear resistance and durability. Minimize measurement errors and make the measurement results more accurate.

Quick measurement steps – Cylinder sleeve height using pointed contact; Counter bore depth using flat end contact; Top dead center; Piston-to-deck height; Valve protrusion; Easy reading around entire bore.

Gradient spacing of 0.0005"

Insulated grip for extra stability

Two-point contact for detection of geometry problems such as ovality and taperCarbide-tipped contact points for extended wear and improved abrasion resistance

Valuable Application -- Professional Cylinder Dial Bore Gage great for hobby machinists as well as mechanics, it is commonly used to measure many kind of automotive’s parts or cylinders and easily check for ovality or out of roundness. It can measure the interior diameter of a hole at any depth (within its reach), while internal micrometers can only measure to the depth of their contacts.

Valuable Application -- Professional Cylinder Dial Bore Gage great for hobby machinists as well as mechanics, it is commonly used to measure many kind of automotive’s parts or cylinders and easily check for ovality or out of roundness. It can measure the interior diameter of a hole at any depth (within its reach), while internal micrometers can only measure to the depth of their contacts.

Technical Features -- Designed 2”-6” Measuring Range, 0.0005” Graduation, 9.5” Measuring Depth. Come with 2″ Contact Extension, 10 x Anvils (, 2.2", 2.4", 2.6", 2.8", 3", 3.2", 3.4", 3.6", 3.8", 4" ), 3 x different size Washers (0.1”, 0.05, 0.02”)Complete set -- The whole set include 1 x Dial Indicator, 1 x Chrome Plated Handle, 1 x Contact Extension, 3 x Washers, 10 x different size Anvils, all parts are collected in a fitted case

This diesel compression tester kit comes complete with adapters for both direct and indirect diesel injected engines

It checks diesel engine compression under cranking conditions and comes with small profile, quick coupling adapters for speed and security

The built-in pressure relief valve enables repeat tests without dismantling

Absolute Encoder Technology digital indicator w/ IP54 protection

Measure in Inch or Metric with Auto Conversion - Range 1.4" - 6" or 36mm - 150mm

Resolution: 0.00005” / 0.001mm Accuracy: 0.0003” / 0.008mm Repeatability: 0.00005” / 0.001mm

Great Compatibility — Perfectly fit for all diesel engines. Pointed contact for cylinder sleeve height. Flat end contact for counterbore depth. Professional measurement tools to ensure the accuracy of your work.

Easy Reading — Range: 0-1"; Graduations: 0.001". Reading: 0-100. Includes 4374 – Dial Indicator, 4375 – Base, 4230 – Flat Contact, 4378 – Pointed Contact, Hex Wrench and Carrying Case.

Perfect Design — The rotatable bezel with clamp for easy zero set. The interchangeable markers provide reference points for all your measurements. The limit markers can be moved without interfering with the clamp. Lug back with 1/4 hole.

DESIGNED FOR: The bore gauges are used to measure internal dimensions of work pieces by comparative method, allowing for more efficient and trouble-free repairs. Made of quality metal material, this dial bore gauge is durable to use.

50-160MM MEASURE RANGE: These series bore gauges are equipped with a good guiding protective bridge which can be self-centering exactly and reliably, and measuring range is 50-160mm. Easy to measure, and with high accuracy, which is 0.01.

GOOD GUIDING PROTECTIVE BRIDGE: These series bore gauges are equipped with a good guiding protective bridge which can be self-centering exactly and reliably, for fast and accurate measurements.

Dial bore gauge with a measuring range of 2"-6" and a graduations of 0.001".

Self-Centering extender bore gauge for accurate and reliable cylinder bore measurements.

Two-point contact system to measure hole diameters and detect geometry abnormalities.

Textured Design: This folding pad eye is of reliable performance and heavy duty design, contributing to ultimate protection from rust and will give a pristine look to any boat.

Flawless Polishing: Using fine grinding mirror polishing, which has wonderful precision, brightness and flatness. Maximum rust resistance and stability even in marine environments.

Stably Durable: Our 316 stainless steel folding pad eye remains durable even being exposed to saline water environment for a long time, therefore you can expect a lasting service with confidence.

1.8 to 4” range, 6” probe depth, 0.00005”/0.001 mm resolution, with + or - 0.00012” accuracy

LCD display for easy measurement reading

Conforms to IP 53 for dust and water protection