Screwdriver bits are typically made up of a shaft and a tip. A screwdriver bit's shaft is typically hexagonal in shape, with six flat sides. This shaft is fitted into the end of a screwdriver that has a bit holder. The shaft's shape prevents the bit from rotating within the bit holder. The tip end of a screwdriver bit may have many shapes.The bit's head is designed to fit into the head of a screw. As the screwdriver is spun, the bit rotates as well. This is what causes the screw to turn.

Minute diamond particles on the tip of the tool bite into the screw and ensure that the tool is securely positioned in the head of the screw. This gently reduces 'cam-out forces' that require users to apply a high amount of pressure on the screwdriver.

• SKU Wera PZ3 x 25mm Diamond Coated Bi-Torsion Screwdriver Bit