FEATURES: ADJUSTABLE SPANNER WRENCH SET: This Adjustable Hook and Pin Wrench Set Includes (4) hook wrenches, (4) round pin adapters,(4) square pin adapters and (1) hex key. VERSATILE APPLICATION:4 Pack Adjustable C Spanner Hook Wrenches cover the most commonly needed sizes of 3/4″ to 2″, 1-1/4″ to 3″, 2″ to 4-3/4″, and 4-1/2″ to 6-1/10″; Ideal for adjusting, loosening, or tightening various fasteners like locknuts, bearings, and collars in a wide range of diameters. .