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Screwdriver Bits

Used with screwdrivers with interchangeable heads such as ratchet and torque screwdrivers, Screwdriver bits provide a handy solution to tackling varying sizes and types of screws, in essentially a single tool.
Much like standard screwdrivers, screwdriver bits conform to the same measurements and types, but in one handy interchangeable tooling option, making for more efficient working.

Cromwell offer a wide range of screwdriver bits from reputable brands such as Kennedy, Bosch and Expert by Facom.

How do screwdriver bits work?

Screwdiver bits operate in much the same way as standard screwdrivers, relying on physical force to turn the driver head in the direction that you want the screw to turn. In the case of ratchet screwdrivers and torque screwdrivers, this force can be made easier by locking the ratchet setting in the correct direction allowing for additional torque. Simply slot the bit onto the shank of the tool and use as normal.

Types of screwdriver bits

Screwdriver bits come in various types like regular screwdrivers. Below you will find the most common types listed.

• Flathead bit - Also referred to as a slot screwdriver bit. Their main feature is a flattened tip used for screws with a straight linear recess.

• Phillips' bit - Also known as crosshead bits, Phillips' bits are one of the most common types next to the flathead and are purposely designed to fit screws a cross-shaped recess.

• Torx/Star bits - Commonly known as star head bits, these screwdriver bits are designed to fit six-pointed screw recesses (also known as Torx screws).

• Tri-Wing bits - These are used for specific devices and mainly feature quite small tips to enable use with smaller screws and components.

• Pozidriv bits - These are designed as an upgrade to Phillips' bits and help to reduce "camming out", in which the bit jumps out of the slot.

• Hex bits - These bits function much like hex keys and are designed to fit hexagonal screw slots

• Square bits - Much like the hex bits, these types of screwdriver bits fit with square recesses and deliver good purchase especially when tightening.

• Magnetic bits - Some screwdriver bits feature magnetic tips. These come in handy when working in confined spaces where losing a fastener in hard to reach places is a risk.


What materials are screwdriver bits made from?
Screwdriver bits are typically made from steel, or a steel alloy equivalent and can commonly feature different coatings such as Black Oxide, Titanium and Diamond. Coatings are particularly useful for tougher applications where wear can be an issue.