The 6-pt Wheel Bearing Locknut Sockets with Tool Board, No. 9850, from OTC, include 21 sockets made of high-strength steel that resist rounding when removing or installing locknuts. The sockets are designed for use with 3/4" square-drive manual tools only and come on a tool board that keeps the sockets organized and clearly labeled. The set includes sizes 2-3/32", 2-1/4", 2-3/8", 2-3/8", 2-1/2", 2-9/16", 2-9/16", 2-5/8", 2-3/4", 2-7/8", 3", 3-1/8", 3-1/4", 3-1/2", 3-3/4", 3-7/8", 4", 4-1/8", 4-3/8", 4-7/8", and 5-1/4".