1/4” hex power drive Torx® bits. They are made of S2 alloy steel for exceptional strength and durability. Intermediate-hardening heat treatment. Urrea offers hand operated bits (for screwdrivers and ratchets) and power operated bits for use on air tools. They feature an optimal quality-to-price ratio thanks to our tempering system and controlled manufacturing processes. Urrea guarantees uniform quality by selecting adequate materials for each one of the following applications. Tip Size: T15. Tip Diameter: 0.187”. Total length: 3-1/2”.