This 13-piece tamper proof Torx interchangeable bit set is a must-have for any mechanic or DIY enthusiast. The set includes 3/8″ and 1/4″ drive sizes and features a matte surface finish for durability. The adapter included in the set makes it interchangeable with other sockets and bits. The set is designed with a specialty system of measurement and is suitable for various applications. The TP13 set comes from an unknown country/region of manufacture and is a set item. The drive type is tamper proof Torx T-9×55, making it versatile and reliable.