Four Stroke A Small Intro Four Stroke is a small e-commerce Retailer managed by 2 Friends, who are passionate about Tools, Building ware, Renovation and Hardware. Item Description Sealey Socket Security Bit Set 38pc 1/4" 3/8" 1/2"Sq Drive Drop-forged Chrome Vanadium steel sockets with S2 steel TRX-Star* bits Sockets heat treated and chrome plated for resistance to corrosion Fully polished mirror finish with knurled ring to assist gripping with oily fingers Contents: TRX-Star* Socket Bits; 1/4"Sq Drive - T8, T10, T15, T20, T25, T27, T30, 3/8"Sq Drive - T40, T45, T47, T50, T55, 1/2"Sq Drive - T60, Security TRX-Star* Socket Bits; 1/4"Sq Drive - T7H, T8H, T9H, T10H, T15H, T20H, T25H, T30H, 3/8"Sq Drive - T40H, T45H, T50H, T55H, TRX-Star* Sockets; 1/4"Sq Drive - E4, E5, E6, E7, E8, 3/8"Sq Drive