ITEM NAME:5Pcs 150Mm Torx Screwdriver Bits Long Magnetic Electric Screwdriver Bits Se E7K6 5Pcs 150Mm Torx Screwdriver Bits Long Magnetic Electric Screwdriver Bits Se E7K6 Color: silver Material: alloy steel All torx bits have a centre bore.Those Torx Screwdriver Bits are made of S2 alloy steel which is a commonly used material in hardware with high hardness.Magnetic bits are firmly fixed on screwdrivers. Fit for electric screwdrivers, hand screwdrivers, electric drills, air drills and so forth. 5 sizes a set at an inexpensive price can meet your requirements. Length of Screwdriver(approx.): 150mm Type of Head: Torx Type of Shank: Hex Dia. of Shank: 6.35mm / 1/4 inch Size of Bits: T10 T15 T20 T25 T30 T10:4.0mm T15:4.5mm T20:5mm T25:5.5mm T30:6mm Usage: For 1/ 4inch Pneumatic Screwdrivers Quantity: 1 Set (5 Pcs) Transition: 1cm=10mm=0.39inch Package Included:5* Torx Screwdriver bit(5Pcs/Set)