11 Piece Torx Set T6-T40 Round Shank 1/4 Inch Hex End 3 Inch Length Sizes included: T6, T7, T8, T9, T10, T15, T20, T25, T27, T30, and T40. All have round shank to reach screws in recess location. Made of S2 steel for maximum durability. Bits are impact ready. Suitable for both hand tool and electric tool | Bits are 3 inches long. US-BASED CUSTOMER SERVICE: Available by chat, email, phone, or visit us at our customer service center in La Crosse, WI.