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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. Head style:Slotted 4.0 x 0.5mm Length:39mm
| Length | 39mm |
| Tip Size | 4.0mm |
| Diameter | 4.0mm |
| Tip Type | Slotted |
| Width | 0.5mm |
| Number of Pieces | 1 |
| Product Type | Screwdriver Bits |
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