So straight and concentric, close bite, can better improve work efficiency. Anti-rust plating process, longer life, the scaling black treatment. A variety of models can be used, electric drills, cordless drills, table drills, screwdrivers can be used. For Plasterboard Positioning Screwdriver Bits Specifications: Product Name:Positioning Screwdriver Bits Size:50mm Model:Cross Note: Installation guide not included, Please check as much as possible to make sure the item is what you need. Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Color: As Shown Material: Metal Package Contents: 15 x Positioning Screwdriver Bits Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.