Best quality heat treated steel for durability
Internal Torx style bit has internal dimple retention feature force bit surface to opposite side for maximum retention
Hard stamped on body of socket for easy identification of size
Torx socket tips are made from heat treated tempered alloy steel
From the Manufacturer
GearWrench 80668 1/2-Inch drive 2 piece Torx tamper-proof socket T-60 bit. Has heat treated steel socket for durability and serviceability. Internal Torx style bit has internal dimple feature that forces bit surface to the opposite socket wall side for maximum retention. Torx tamper-proof bits are precision formed to exact dimension tolerances for a perfect fit. GearWrench 80668 Torx socket tips are made from heat treated, tempered alloy steel, which provides high strength.