This three-piece Torx Bit Set includes T-40, T-45, and T-50 star bits for removing caliper bolts. This high-quality bit set services brake systems on both domestic and import vehicles. These mirror-polished 3/8" drive premium chrome vanadium metric hex bit sockets are strong as well as beautiful. The hardened S2 steel bits are precision ground for a tight fit on cap screws and other internal hex fasteners. Dependable Powerbuilt sockets meet or exceed ANSI standards and have a lifetime warranty, all at affordable prices.