Performance Tool12 piece Star Bit Socket Set part number W38802. Chrome vanadium constructed. Fully polished. Lifetime warranty. Sizes: 1/4 3/8 1/2Drive 12 piece: T-10 T-15 T-20 T-25 T-27 T-30 T-40 T-45 T-47 T-50 T-55 T-60Caution: DONOTuse chrome sockets or drive with impact or power tools. Pull hand tools toward you. DONOT push. Maintain your balance. Keep tools clean.