REXBETI 12 Piece Torx Head Screwdriver Bit Set, 1/4 Inch Hex Shank One Size Product Details Brand: REXBETI Item Length: 3 Inches Material: S2 Steel Drive System: Torx Finish Type: Steel Number of Pieces: 12 Drive Bit Shank Style: Hex Bit Compatibilities: Hand Tools, 1/4 Inch Hex Shank Power Drills Manufacturer: REXBETI Part Number: REX-8998 Item Weight: 5.6 ounces Item model number: REX063 Size: One Size Style: torx bit set Finish: Steel Pattern: torx bit set Head Style: Hex, Torx Compatible Fastener Range: 0.25 inch Batteries Included?: No Batteries Required?: No Brand: REXBETI Item Length: 3 Inches Material: S2 Steel Drive System: Torx Finish Type: Steel Tamper Proof Security Bits in the Following Sizes T5, T6, T7, T8, T9, T10, T15, T20, T25, T27, T30, and T40?Note: T5 and T6 are not security tamper proof type) Drill bits made from high quality S2 steel material for ultimate durability, suitable for industrial use Strong magnetic and high precision. each edge can be accurately locked screws, no damage to the screw and the screwdriver head Not only can you use the bits on hand tools, you can easily insert them to any 1/4 inch hex shank power drill to use