Heavy-Duty 12-Inch F-Clamps, 2-Pack, 3450 Lbs Forged Alloy Steel 12 x 5-1/2 Inch (300140mm)/3,450 Lbs 2

Specifications:

HEAVY-DUTY FORGED ALLOY STEEL – Drop-forged alloy steel bar and jaws hold your workpiece steady for welding, cutting, and grinding, rated to a maximum clamping capacity of 3,450 lbs (1,570 kg). A heavier gauge than light-duty stamped clamps, built for real fabrication loads.
DEEP 5-1/2" THROAT & 12" OPENING – The 5-1/2 in (140 mm) throat reaches in past the edge so you can clamp closer to the middle of your work, while the 12 in (300 mm) opening takes thick plate, box tube, and stacked stock with room to spare.
BLACK-OXIDE THREADED SPINDLE – The threaded spindle turns smoothly through repeated open-and-close cycles, finished in black oxide to resist rust and corrosion in a hot, spatter-heavy shop.
SOLID STEEL CLAMPING JAWS – Flat, fixed steel jaws give direct, full-width contact with plate, bar, and square stock for heavy welding and fabrication work.
STEEL RAIL END-STOP – The sliding arm slides along the steel rail for fast positioning before the spindle locks it down, and a steel stop fixed to the rail end keeps the arm from sliding off in use.