Best Diablo Self Feed Drill Bits in 2026

IRWIN SPEEDBOR drill bits use a tri-flute design for faster chip ejection and less binding

This 7/8-inch drill bit has cutting spurs with 3 cutting edges for faster, cleaner holes

A full screw tip allows the drill bit to self-feed for ease of drilling

Aggressive spur provides fast material penetration

Optimized cutting geometry provides longer bit life

Open tooth design allows for more resharpenings

4-Flute design with screw-point tips for easy to start self-feed drilling point

Four cutting spurs for faster chip clearance and cutting

Commonly used diameter sizes makes perfect for many DIY projects. 1/2", 5/8", 3/4" and 1" diameter sizes included. Each bit is 6.5" long.

The product is easy to use

The product is durable

The product is manufactured in China

4-5/8-Inch Diameter

1/2-Inch hex shank

Adjustable tapered screw tip

Auger drill bit set for a wide range of wood drilling tasks

Includes 6 drill bits (1/2, 5/8, 3/4, 7/8, 1, and 1-1/4") and a storage case

Tri-flute design for faster, cleaner holes. When drilling holes larger than 3/4 in size, it is recommended to use the corded drill.

Package Dimensions: 17.78 cms (L) x 10.414 cms (W) x 17.78 cms (H)

Product Type: Drill Bits

Package Quantity: 1

Designed for plumbers and electricians to bore holes in wood to run pipe and conduit, Swift Bore (Registered Trademark)

High-speed steel cutter designed for maximum cutting and chip removal

Tapered rim with multiple teeth cuts clean, smooth holes

Designed for Professionals: The Greycore Tools wood boring drill bit is specially engineered to improve wood drilling performance, ensuring fast and easy material penetration and safe drilling operation.

Built to Last: Our wood drill bits feature a heavy-duty construction made with high-grade materials that provide superior drilling performance and stability, enhanced durability and resistance.

Aggressive Feed Screw: The aggressive deed screw thread is designed for fast and smooth material penetration while preventing stalling. The open-tooth design allows easy re-sharpening to enjoy the same performance for longer.

Combination Drill and Tap Bit: Thread Size: M6 x 1; Hex Shank Size: 1/4". Combination drill and tap bit set can complete hole drilling, tapping, deburring and countersinking. One-step operation greatly saves processing steps and improves working efficiency.

Wide Applications: Suitable for processing blind holes. Used for tapping aluminum, die steel, stainless steel, bronze, hard plastics, etc.. Recommended feed rate: general steel: 6-15m/min; harder steel: 5-10m/min; stainless steel: 2-7m/min; cast iron: 8-10m/min.

Features: Self-centering point, do not need assistant center drilling or center punching. Quick change 1/4-inch hex shank can be used on power tools more easily and securely. A tapered end on hex shank can prevent excessive tapping.

Adds 12 inches to SPEEDBOR Max Self-Feed wood drilling bits.

Forged in one piece from high carbon steel for maximum strength under tough drilling conditions.

Precision-milled shank eliminates run-out and wobble.

The product is 1-1/2 inch self feed bit with 2 feed screws included

Easy and simple use kit

The product is manufactured in china

HSS steel forging, high hardness and wear resistance.

The cutting edge is sharp and the incision resistance is small.

Drill hole positioning accurate.

Made from forged and heat treated steel

Unique non-clogging design allows you to drill precise holes quickly without burning

Threaded screwpoint pulls the bit into the work

Used by plumbers, electricians and other tradesmen for boring holes in pipe, conduit, wood

Outlining spurs accurately define hole diameter

Threaded screw point pulls the bit into the work

Self Centering Drill Bit for Hinges: 5mm and 1/4 inch drill bits for boring holes in different sizes, Shank : 1/4 hex shank.

Function: These hinge bit can reliably and accurately center the holes for mounting hinges and other types of hardware. Applicable for the installation of the door hinge.

Multifunction: Drill bush for precise positioning, without move. Widely used on wood and plastic, chip will be removed automatically from these two side holes.