Description
These screwdriver bits are made of high quality alloy steel material which is large moment of force ,durable, anti-impact and tough. The surface is processed by special blue treatment, not easy to rust. The magnetic head of the bit is convenient to use and not slip. With 6.3mm(1/4inch) hex shank,Those bits are magnetic that can be firmly fixed on screwdrivers, fitting for electric screwdrivers, hand screwdrivers, electric drills, air drills and so forth practical item, make your life easierification: Material: alloy steel Size: SL4mm Hex Shank: 6.3mm / (1/4inch) Type of Head: Slotted Type of Shank: Hex Length:50mm / 1.97inch Weight:89g Package Includes: 10 x 4 mm Slotted Tip Screwdriver BitsNotes: 1 not turn the screws with unmatched size, in case get both screw and bit damaged. 2se allow a bit manual measuring errors.