Square Drive Bits | McMaster-Carr

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	For Drive Style For Drive Style


Torx	Phillips	Hex

Slotted	Square	Tamper- Resistant Torx

Pozidriv®	External Hex	Drilled Spanner

Torq- Set®	Tamper- Resistant Hex	Double Square

Tri-Wing®	Clutch	Triple Square

Square Phillips	Tamper- Resistant Square

	Socket Type Socket Type


Socket	Hex Shank to Square Drive Adapter

Square Drive Size Adapter	Flex Adapter

	Driver Style Driver Style


Bit	Driver

	System of Measurement System of Measurement

Inch

Metric

in.-lbs.

	Size Size

	Individual/Set Individual/Set

Individual

Set

	Number of Pieces Number of Pieces

100

	Tip Style Tip Style

	Standard

	Overall Length Overall Length

	Hex Shank Size Hex Shank Size

	Shank Type Shank Type

Hex

Quick-Change Hex

Reversible Hex

	For Screw Size For Screw Size

	Torque Adjustability Torque Adjustability

Adjustable

	For Bit Hex Shank Size For Bit Hex Shank Size

1/4"

5/16"

	Maximum Torque Maximum Torque

Less than 100 in.-lbs.

Less than 10 Nm

	Minimum Torque Minimum Torque

2 in.-lbs.

0.2 Nm

	Container Type Container Type

	Torque Driver Type Torque Driver Type

Torque Limiting

	Grip Style Grip Style


Plain	Cushion

Ultra Grip

	Power Source Power Source

Manual

	Material Material

Stainless Steel

Steel

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

REACH Compliant

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

RoHS Compliant

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149 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.

Reversible Square Bits

Bits have a different size at each end.

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.

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.

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.