Large , Big and can hold great on heavy weldments up to 20 of grab. Or slide bar clamp down then to zero.Screw bar slides to desired size and holds in place when screw is tight. This is for the PAIR, two clamps. Overall 24 long with the Heavy Duty Swivel Pads. Looks like 7 inch throat. If you have big work, this is the right clamp. Now called GSM50 but these are even heavier. 2660 Lbs of down force. The item "Welding Vise BESSEY CLAMPS HEAVY DUTY 20 x 6-1/2 force to 2660 Lbs. 2 Pcs" is in sale since Sunday, July 15, 2018. This item is in the category "Home & Garden\Tools\Hand Tools\Clamps & Vises". The seller is "geoline44" and is located in Bedford, Ohio. This item can't be shipped, the buyer must pick up the item.