The Yato YT-0512 9-Piece Hex Key Wrench Set is a professional 9-piece, long-arm Torx security (tamper-proof) key set designed for high torque and versatility in automotive and industrial tasks. Made from durable CrV 6150 steel, these keys (T10-T50) feature a hole at both ends to handle security fasteners and are organized in a convenient hanger.