Jorgensen 8-inch Bar Clamp Set, Ratcheting Bar Clamp for Woodworking, Quick Release Gear Clamp with 600 lbs Load Limit - 2 Pack

Maximum Opening Capacity: 8 inches. Throat depth is 3 inches. | Maximum Load Limit: 600 pounds. | Rapid Action: The handy quick-release button releases the clamp instantly. With a quick push on the power bar, the gear clamp is easy to adjust and release. | Minimal Movement During Tightening: Holds very well and doesn't cause "shifting" or "twisting" while tightening. | Note: Open the handle to the maximum, then slide to clamp whatever you are clamping, then pull the lever towards the black bar; otherwise, it might come loose.