Strong and durable, these multipurpose bits are for use with bit screwdrivers.

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.

A retaining ring at the tip grips inside the recess to ensure screws won't slip off the bit.

An opening at the tip accommodates the pin in the recess of tamper-resistant pentalobe and tamper-resistant Torx Plus screws.

Strong and durable, these multipurpose bits are often used with power tools to install sheet metal screws.

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

The slightly tapered tip wedges into the screw recess for a secure hold. Also known as Torx-Align 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.

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

Ribs forged into the wings of these bits grip the screw recess to reduce stripping. They're also known as ACR® 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.

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

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

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

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

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.

Bits have a different size at each end.

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.

Use with screws that have two drilled holes.

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.

Strong and durable, these multipurpose bits are for use with bit screwdrivers.

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

Also known as Polydrive bits.

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.

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.

A three-winged tip fits triangular slotted screw recesses.

Grip the indentations on the head of tri-groove fasteners.

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

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

The toughest bits available, these withstand the shock and twisting force of impact drivers. A magnet holds the nut in place.

A magnet or retaining ring holds the nut in place.

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.

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

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

These bits are also known as nut setters.

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.

Grip the indentations on the head of tri-groove fasteners.

Use with screws that have two drilled holes.

Designed for the fasteners used in electronics assembly, the tip of these bits has slightly sharper corners than Phillips style.

A three-winged tip fits triangular slotted screw recesses.

Use 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.

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.

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).

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

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

Keep these caddies in your tool drawer or take them with you.

Store a variety of sizes and styles of bits and adapters in one compact tray.

When a standard-tip key can't make good contact with the recess, a ball end allows angled entry to turn screws in hard-to-reach places.

These assorted keys have a ball end that allows angled entry to make good contact with the screw recess when standard-tip keys can’t. Use to turn screws in hard-to-reach spots.

These assorted keys have a bright finish that's easy to see, so they’re less likely to be misplaced. They turn fasteners from either end and reach into tight spots.

When a standard-tip key can't make good contact with the recess, a ball end allows angled entry to turn screws in hard-to-reach places. These keys have a bright gold-plated finish that makes them easy to see and less likely to be misplaced.

These keys have an extra-short leg to fit into tight spaces that other tools can’t, and a ball on the long leg for angled entry to turn screws in hard-to-reach places. A bright chrome-plated finish makes them easy to see and less likely to be misplaced.

Turn fasteners from either end and reach into tight spots.

Each size of these keys is a different color for easy identification. When a standard-tip key can't make good contact with the recess, a ball end allows angled entry to turn screws in hard-to-reach places.

The zinc coating on these keys resists salt-spray exposure. They turn fasteners from either end and reach into tight spots.

The ball end has a detent to grip inside the screw recess and allows angled entry to turn fasteners in hard-to-reach areas.

A flexible joint provides access to fasteners in hard-to-reach areas.

The ball end allows angled entry to turn screws in hard-to-reach areas. Protect your stainless steel screws by using a stainless steel L-key. If steel flakes off a standard tool and into the recess, it can lead to rust and contamination. These keys eliminate that risk.

Sets include an assortment of stainless steel keys with a ball end that allows angled entry to turn screws in hard-to-reach areas. Use a stainless steel L-key to protect your stainless steel screws. If steel flakes off a standard tool and into the recess, it can lead to rust and contamination. These keys eliminate that risk.

These assorted keys are made of beryllium copper that is FM approved. They help meet OSHA requirements that specify nonsparking tools for locations where flammable vapors and combustible residues are present. Keys turn fasteners from either end and reach into tight spots.

These plastic organizers store keys in slots marked with the size.

Sets include assorted keys with long shafts that reach into tight spots. The plastic-covered handles provide a good grip for your whole hand.

Sets include an assortment of short keys that fit in tight spaces where others can't.

When a standard-tip key can't make good contact with the recess, a ball end allows angled entry to turn screws in hard-to-reach places.

These assorted keys have a ball end that allows angled entry to make good contact with the screw recess when standard-tip keys can’t. The textured grip provides comfort, slip resistance, and maximum torque.

When a standard-tip key can't make good contact with the recess, a ball end allows angled entry to turn screws in hard-to-reach places. These keys have a textured grip that provides comfort, slip resistance, and maximum torque.

With a simple loop handle, these keys are the economical choice. They have a long shaft for reaching into tight spots and the T-handle provides a good grip for your whole hand when turning fasteners.