OTC 1908 Locknut Socket, 3/4 Dr, 3-1/4 In, 6 Pt, DeepThis high-grade truck wheel bearing locknut socket is made of high-strength steel. NOTE: Sockets are designed for use with 3/4″ square-drive manual tools only. Impact tool use voids sockets’ warranty.• Opening size (6 pt.) 3-1/4″ – Click Here. Double your traffic. Get Vendio Gallery – Now FREE!