The toughest bits available, these withstand the shock and twisting force of impact drivers.

When you don't have exact alignment between the fastener and the bit, the ball end allows angled entry to turn screws in hard-to-reach areas. A retaining ring grips inside the recess to hold screws in place.

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.

The toughest bits available, these withstand the shock and twisting force of impact drivers.

Drive screws with both ends of these bits. Use with hand drivers.

The small-diameter shaft can access screws in narrow recessed holes.

A wide tip makes good contact in shallow and coated screw recesses, such as those filled with paint.

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.

The toughest bits available, these withstand the shock and twisting force of impact drivers.

When you don't have exact alignment between the fastener and the tool, the ball end allows angled entry to turn screws in hard-to-reach areas.

Bits have a different size at each end.

Strong and durable, these multipurpose bits are for use with bit screwdrivers. They are often used with power tools to install sheet metal screws.

Remove screws in hard-to-reach places. A spring-loaded sleeve guides bits onto the screw head and keeps them from slipping out.

The small-diameter shaft can access screws in narrow recessed holes.

An opening at the tip accommodates the pin in the recess of tamper-resistant hex screws. These are also known as pin-in-hex or pin-in-socket bits.

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.

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.

These bits provide a secure grip on the Phillips/slotted combination-drive screws in electrical equipment.

Bits have a different size at each end. An opening at the tips accommodates the pin in the recess of tamper-resistant Torx screws. These are also known as pin-in-Torx 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.

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

Turn two drive styles with one reversible bit. Remove and replace to change the tip.

An opening at the tip accommodates the pin in the recess of tamper-resistant Phillips screws. These are also known as pin-in-head Phillips bits.

These bits have an offset cross shape. They’re also known as ACR® bits.

The toughest bits available, these withstand the shock and twisting force of impact drivers.

Ribs forged into the wings of these offset-cross-shaped bits grip the screw recess to reduce stripping. They are also known as ACR® bits.

These are also known as TP3® bits.

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

Turn the screws found in Apple devices.

The tip is shaped like an eight-pointed star.

Turn screws that have the tamper-resistant asymmetrical drive exclusive to McMaster-Carr.

Also known as Reed and Prince bits.

Because they make contact on the flat sides of fasteners rather than only on the corners, these magnetic bits significantly reduce slipping and stripping. They’re also known as lobular bits.

Turn hex nuts and cap screws.

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

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.

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.

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

Attach these adapters to square-drive tools.

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).

Assortments contain bits with multiple drive styles.

Less likely to crack or shatter under high torque than standard bits, these are often used with power tools to install machine screws.

A magnet holds the nut in place.

An opening at the tip accommodates the pin in the recess of tamper-resistant hex screws. These are also known as pin-in-hex or pin-in-socket bits.

Also known as Bristol bits, these have a knurled-end shank that allows finger tightening. They can also be used with the included screwdriver.

An opening at the tip accommodates the pin in the recess of tamper-resistant Torx screws. These are also known as pin-in-Torx bits.

These bits have an offset cross shape.

Turn sockets with a bit screwdriver.