Square Drive Bits | McMaster-Carr

Clear All

	For Drive Style For Drive Style


Clutch	Double Square

Drilled Spanner	External Hex

External Square	Hex

Phillips	Pozidriv®

Slotted	Square

Square/Phillips	Tamper- Resistant Hex

Tamper- Resistant Square	Tamper- Resistant Torx

Torq-Set®	Torx

Triple Square	Tri-Wing®

	Socket Type Socket Type


Socket	Hex Shank to Square Drive Adapter

Square Drive Size Adapter	Flex Adapter

	System of Measurement System of Measurement

Inch

Metric

in.-lbs.

	Drive Size Drive Size

	Driver Style Driver Style


Bit	Driver

	Individual/Set Individual/Set

Individual

Set

	Overall Length Overall Length

	Tip Style Tip Style

	Standard

	Number of Pieces Number of Pieces

100

	Hex Shank Size Hex Shank Size

	Shank Type Shank Type

Hex

Quick-Change Hex

Reversible Hex

	For Screw Size For Screw Size

	Maximum Torque Maximum Torque

Less than 100 in.-lbs.

Less than 10 Nm

	Container Type Container Type

	Minimum Torque Minimum Torque

2 in.-lbs.

0.2 Nm

	Torque Adjustability Torque Adjustability

Adjustable

	Certification Certification

Calibration Certificate with
Test Data Traceable to NIST
Certificate of Calibration

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

REACH Compliant

	Shaft Material Shaft Material

Aluminum

Steel

	Torque-Limiting Mechanism Torque-Limiting Mechanism

Slip Release

	For Bit Hex Shank Size For Bit Hex Shank Size

1/4"

5/16"

	Grip Style Grip Style


Plain	Ultra Grip

Cushion

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

RoHS Compliant

Forward

How can we improve?

315 Products

Screwdriver Bits

Square Bits

Strong and durable, these multipurpose bits are for use with bit screwdrivers. They're designed for screws with a square recess in the head and are also known as Robertson bits.

Square Bits for Impact Drivers

The toughest bits available, these withstand the shock and twisting force of impact drivers. Designed for screws with a square recess in the head, they are also known as Robertson bits.

Square Bits for Stainless Steel Screws

Protect your stainless steel screws by using a stainless steel bit. If steel flakes off a standard bit and into the recess, it can lead to rust and contamination. These bits eliminate that risk.

Depth-Limiting Square Bits

An exterior stop collar prevents fasteners from being driven too deep. Use with soft materials such as drywall, wood, and fiberboard.

Reversible Square Bits

Bits have a different size at each end.

Double Square Bits

The tip is shaped like an eight-pointed star.

Triple Square Bits

These bits are shaped like a 12-pointed star. They're also known as XZN bits.

Square/Phillips Bits

While screws with a Square/Phillips combination drive can be turned with either a Square or Phillips bit, these make the best contact so you can apply high torque without slipping and stripping the recess. They are also known as Quadrex bits.

Tamper-Resistant Square Bits

An opening at the tip accommodates the pin in the recess of tamper-resistant square screws.

Bit Sets

Bit Assortments

Assortments contain bits with multiple drive styles.

Square Bit Sets

Also known as Robertson bits these are designed for screws with a square recess in the head.

Torque Screwdriver and Bit Sets

These sets include an adjustable torque driver, bits for different drive styles, and a socket adapter.

Bit Screwdrivers

Tight-Clearance Ratcheting Bit Screwdrivers

A ratchet mechanism allows you to drive fasteners when there's little space to move the handle.

Ratcheting Bit Screwdrivers

A ratchet mechanism turns fasteners more quickly than a standard bit driver. Insert a bit into the shaft and a magnet holds it in place.

Electrical-Insulating Bit Screwdrivers

An insulated handle and shaft protect against shock from accidental contact with live electrical circuits. These tools are tested to 1,000 volts to meet EN 60900 and IEC 60900.

Reversible-Bit Screwdriver/Nutdrivers

Bits have a different tip at each end and snap into the shaft, which is also a nutdriver.

Sockets

Square Bit Sockets

These sockets are also known as Robertson bits.

8-Point Sockets

Quickly position these sockets on square and external 8-point fasteners.

Universal-Fit Sockets

Turn many sizes of square, hex, and 8-point fasteners with one socket. Place over the fastener and 54 pins move to grip it securely.

4-Point Sockets

Also known as pipe plug sockets, these sockets have a square shape that provides the best possible grip on square fasteners and prevents rounding.

Tight-Clearance Offset Sockets

Often used with an extension, these sockets turn fasteners and fittings in obstructed areas that a regular socket can't reach. They are also known as crowfoot wrenches.

8-Point Impact Sockets

Quickly position these sockets on square fasteners.

Extra-Deep 8-Point Impact Sockets

Extra length allows access to fasteners on long bolts.

4-Point Impact Sockets

The square shape provides the best possible grip on square fasteners and prevents rounding.

Socket Sets

Wheel Bearing Locknut Socket Sets

Shaped and sized for compatibility with wheel bearing locknuts on trucks and trailers, the sockets in these sets make it easy to install and remove locknuts.

8-Point Socket Sets

Quickly position these sockets on square fasteners.

Tight-Clearance Offset Socket Sets

Often used with an extension, these sockets turn fasteners and fittings in obstructed areas that a regular socket can't reach. They are also known as crowfoot wrenches.

Square Drive Size Adapter Sets

Convert from one square drive size to another.

Impact Square Drive Size Adapter Sets

Convert from one square drive size to another.

Budd Wheel Impact Socket Sets

Remove and install dual wheels on trucks and trailers with the sockets in these sets.

Socket Adapters and Extensions

Hex Shank to Power Socket Square
Drive and Impact Square Drive Adapters

Use sockets with tools that accept hex shanks, such as impact drivers and power drills.

Hex Shank to Square Drive Adapters

Turn sockets with a bit screwdriver.

Square Drive Size Adapters

Convert from one square drive size to another.

Convertible Square Drive Size Adapters

Push the square drive through the adapter to change size.

Electrical-Insulating Square Drive Size Adapters

These adapters are insulated to protect against accidental contact with live electrical circuits. They are tested to 1,000 volts to meet IEC 60900.

Impact Square Drive Size Adapters

Convert from one square drive size to another.

Impact Magnetic Square Drive Size Adapters

A magnet holds the socket, making changes quicker.

Screwdriver Bits

Square Bits

Square Bits for Impact Drivers

Square Bits for Stainless Steel Screws

Depth-Limiting Square Bits

Reversible Square Bits

Double Square Bits

Triple Square Bits

Square/Phillips Bits

Tamper-Resistant Square Bits

Bit Sets

Bit Assortments

Square Bit Sets

Torque Screwdriver and Bit Sets

Torque Screwdriver and Bit Sets

Bit Screwdrivers

Tight-Clearance Ratcheting Bit Screwdrivers

Ratcheting Bit Screwdrivers

Electrical-Insulating Bit Screwdrivers

Reversible-Bit Screwdriver/Nutdrivers

Sockets

Square Bit Sockets

8-Point Sockets

Universal-Fit Sockets

4-Point Sockets

Tight-Clearance Offset Sockets

8-Point Impact Sockets

Extra-Deep 8-Point Impact Sockets

4-Point Impact Sockets

Socket Sets

Wheel Bearing Locknut Socket Sets

8-Point Socket Sets

Tight-Clearance Offset Socket Sets

Square Drive Size Adapter Sets

Impact Square Drive Size Adapter Sets

Budd Wheel Impact Socket Sets

Socket Adapters and Extensions

Hex Shank to Power Socket SquareDrive and Impact Square Drive Adapters

Hex Shank to Square Drive Adapters

Square Drive Size Adapters

Convertible Square Drive Size Adapters

Electrical-Insulating Square Drive Size Adapters

Impact Square Drive Size Adapters

Impact Magnetic Square Drive Size Adapters

Hex Shank to Power Socket Square
Drive and Impact Square Drive Adapters