Extension Drills | McMaster-Carr

	System of Measurement System of Measurement

Inch

in.-lbs.

	Overall Length Overall Length

	Shank Type Shank Type

	Quick- Change Hex
	Round
	Hex
	SDS Plus

	For Drill Bit Shank Type For Drill Bit Shank Type

	Quick- Change Hex
	Round
	Hex
	SDS Plus

	Shank Size Shank Size

	For Drill Bit Shank Size For Drill Bit Shank Size

	OD OD

	For Drill Bit System of Measurement For Drill Bit System of Measurement

Inch

Wire Gauge

	Material Material

Steel

Aluminum

Stainless Steel

	For Drill Bit Size For Drill Bit Size

	Extension Style Extension Style

One Piece

Two Piece

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	For Bit Hex Shank Size For Bit Hex Shank Size

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	For Bit Shank Type For Bit Shank Type

	Hex
	Hex for Power Tools
	Half Moon
	HIOS
	Threaded

	Hex Shank Size Hex Shank Size

	Bit-Holding Mechanism Bit-Holding Mechanism

Magnet

Retaining Ring

Quick-Change Chuck

Magnetic Quick-Change
Chuck

	For Drill Bit Size Decimal Equivalent For Drill Bit Size Decimal Equivalent

	Square Drive Size Square Drive Size

1/4"

3/8"

1/2"

	For Use With For Use With

Drills and Powered
Screwdrivers

	For Maximum Drill Torque For Maximum Drill Torque

42 in.-lbs.

156 in.-lbs.

235 in.-lbs.

	Individual/Set Individual/Set

193 Products

Drilling

Quick-Change Extensions for Hex-Shank Drill Bits

A quick-change mechanism allows fast bit changes.

Extensions for Hex-Shank Drill Bits

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

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.

Fast-Cutting Drill Bit Sets for Wood

The screw point draws the bit in, quickly boring holes without applying pressure.

Tight-Clearance Right-Angle Drilling Attachment Kits

Kits include a right-angle attachment, threaded-shank drill bits, extension, chuck adapter, and wrench. The attachment allows you to work in tight spaces with as little as 2" clearance.

Bit Adapters

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.

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.

Bit Adapters

Use 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.

Secure-Hold Bit Adapters for Ratchet Wrenches

Lock your bit into the adapter to prevent accidental disengagement. These adapters attach to square-drive 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).

Bit Adapters for Ratchet Wrenches

Attach these adapters to square-drive tools.

Bit Adapters for Rotary Hammers

Insert these adapters into your SDS-drive rotary hammer to use it with hex-shank bits (also known as insert bits).

Bit Adapters for Bit Screwdrivers

Use a 4 mm bit in a bit driver that's designed for 1/4" bits.

Torque-Measuring Bit Adapters

Eliminate the need for multiple bulky tools with these bit adapters. At less than 3 inches long, these compact adapters convert ¼” bit screwdriver handles and ¼” bits into torque screwdrivers so you can fasten to a specific torque.

Bit Adapters for Impact Wrenches

Designed to withstand high torque and force, these adapters fit the square drive on impact wrenches. Use with hex-shank bits (also known as insert bits).

Drilling

Quick-Change Extensions for Hex-Shank Drill Bits

Extensions for Hex-Shank Drill Bits

Adjustable-Length Quick-ChangeExtensions for Hex-Shank Drill Bits

Extensions for Round-Shank Drill Bits

Extensions for SDS-Plus-Shank Drill Bits

Changeable-Size SDS-Max-Shank MasonryCore Drill Bits for Rotary Hammers

Fast-Cutting Drill Bit Sets for Wood

Tight-Clearance Right-Angle Drilling Attachment Kits

Bit Adapters

Flexible Bit Adapters

Screw-Holding Bit Adapters

Screw-Guiding Bit Adapters

Secure-Hold Bit Adapters

Bit Adapters

Tight-Clearance Bit Adapters

Secure-Hold Bit Adapters for Ratchet Wrenches

Bit Adapters for Impact Drivers

Bit Adapters for Ratchet Wrenches

Bit Adapters for Rotary Hammers

Bit Adapters for Bit Screwdrivers

Torque-Measuring Bit Adapters

Bit Adapters for Impact Wrenches

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

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