The Original™ Locking C Clamp with Regular Tips, 18 in L, 7 1 2 in Max, 9 1 2 in Throat D no checkout secure grip on all hex secure grip on all hex nuts Wider knurl for easier adjustment Laser etched scale provides a quick and convenient way to determine fastener size in either SAE or metric Wide capacity jaw provides versatility to accommodate a greater size range of fasteners Wider handle provides more comfort and less hand fatigue Wide opening jaws provide greater versatility in clamping a variety of shapes Turn screw to adjust pressure and fit Constructed of high grade heat treated alloy steel Classic trigger release designed to provide maximum locking force