Locking Welding Clamp, Locking Pliers Style Plated Steel Welding Clamps, Designed To Grip A Few Inches From The End Of The Metal, Allows Weld To Start Or Finish At The End Of The Joint, Not To Be Used For Scaffolding Or Overhead Lifting, Really Holds 2 Pieces Of Metal Together Ready For Welding, Adjusts To 2 Different Thicknesses In Many Cases, 8-3/8" Length, 2-1/2 - 3" Depth, 2" Maximum Opening.