Drill Bit Extensions | McMaster-Carr

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237 Products

Drill Bits

Extensions for Hex-Shank Drill Bits

Tighten the set screws to secure the drill bit in the extension.

Quick-Change Extensions for Hex-Shank Drill Bits

A quick-change mechanism allows fast bit changes.

Adjustable-Length Quick-Change
Extensions for Hex-Shank Drill Bits

Adjust these extensions to the desired length. They have a quick-change mechanism for fast bit changes.

Extensions for Round-Shank Drill Bits

Attach to the shank of a drill bit to extend its reach.

Extensions for SDS-Plus-Shank Drill Bits

SDS-Plus shanks have two deep slots and two shallow slots for use with SDS-Plus-drive rotary hammers. These extensions have a quick-change mechanism for fast bit changes.

Changeable-Size SDS-Max-Shank Masonry
Core Drill Bits for Rotary Hammers

These bits allow you to easily switch to another size by changing only the bit body. They are hollow and cut with their outside edge for drilling holes larger than 1 1/2" in diameter.

Drivers, Keys, and Bits

Bit Adapters

Use hex-shank bits (also known as insert bits) in powered tools.

Secure-Hold Bit Adapters

Lock your bit into the adapter to prevent accidental disengagement. These adapters hold hex-shank bits (also known as insert bits) in powered tools.

Tight-Clearance Bit Adapters

The head is angled 90° to drive fasteners in tight spaces. Use these adapters to hold hex-shank bits (also known as insert bits) in powered tools.

Flexible Bit Adapters

Bend these adapters up to 90° to access hard-to-reach fasteners. Use them to hold hex-shank bits (also known as insert bits) in powered tools.

Screw-Holding Bit Adapters

A magnetic ring at the end of the adapter holds flat-head screws in place to ensure good contact between the bit and screw. Use these adapters to hold hex-shank bits (also known as insert bits) in powered tools.

Screw-Guiding Bit Adapters

Keep bits from slipping. Insert a bit into the adapter, place a screw on the end of the bit, and slide the adapter sleeve over the screw. The sleeve retracts as the screw is driven. These adapters hold hex-shank bits (also known as insert bits) in powered tools.

Bit Adapters for Impact Drivers

These adapters are designed to withstand the high torque of impact drivers. They hold hex-shank bits (also known as insert bits).

Flexible-Shaft Bit Screwdrivers

Bend the shaft around obstructions to reach fasteners that standard and offset screwdrivers can’t.

Deep-Reach T-Handle Keys with Replaceable Tips

The extra-long shaft lets you access fasteners in deep recesses. To change tips, use a hex key to loosen the set screw.

Deep-Reach T-Handle Key
Sets with Replaceable Tips

These assorted keys have an extra-long shaft that provides access to fasteners in deep recesses. To change tips, use a hex key to loosen the set screw.