TMAX 7 Piece 1" T30 Torx Bit Set - Quick Change Star Driver Bits for T30 (T-30) Screws and Heads DURABILITY: Each T30 Torx/Star Driver bit is made of high quality S2 industrial steel for long-lasting bit life. COMPATIBILITY: These impact rated Torx bits allow you to quickly drive Torx/Star head screws and fasteners with a T30 head. 1/4" drive hex shaft for standard drills. INCLUDES: A 7-pack of 1" T30 (T-30) Torx bits with a convenient plastic holder that displays the head size and pattern. US-BASED CUSTOMER SERVICE: Available by chat, email, phone, or visit us at our customer service center in La Crosse, WI.