【Durable Material】The Torx drill sockets feature high quality durable S2 alloy steel drill bits and chrome vanadium steel sockets. These Torx drill sockets are rare and extremely hard, durable and wear-resistant. 【Multiple Models】The 13pcs Torx Star Bit Socket Set includes 1/4" Drive: T8, T10, T15, T20, T25, T27, T30; 3/8" Drive: T40, T45, T50, T55, T60; 1/2" Screwdriver: T70. The bit itself comes with its own model number. 【Durability and Longevity】Each bit is precision-made using , including chamfered edges to ensure a smooth fit and protection of your drill tips and fasteners. The strong and durable chrome vanadium steel sleeves provide excellent and perfect torque for greater turning power, chrome plated finish for maximum corrosion resistance. 【Portable and Storage】All pieces of this set store safely in a durable blow-molded carrying case for easy organization and convenient portability. 【Wide Application】The product set has a wide range of versatility and functions: both