[Heavy duty F ] The for welding own the adjustable opening up to 12 inch /300 mm, 3.15inch / 80mm throat depth, and 1/3inch thickness spindle for durability and comfort use. [Strong Clamping Force] 2PCS F- have strong clamping pressure of up to 600 kg/ 1320LBS. welding f are not easy to loose which will help you quickly finish welding and woodworking. [] Made of solid 45# carbon steel, and an anti-rust plating surface, these 12-inch F are sturdy, and durable to use. flat and round swivel pad will easy hold flat surfaces, different angled edges and small . [Reasonable ]Built-in swivel pads and utility ,the bar style you with even clamping force while protecting your work pieces. and fast sliding adjustable handle allows you to adjust the supporting range effectively. [Widely Used ] F-Style welding specially designed to evenly clamping force and meet needs of steel welding, woodworking, and steel working. Any queries about strong hand , to contact us. size: 300 x 80mm Material: steel colour: silvery Package Contents: 2 x f clamp Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.