The complete set includes 4pcs 6" bar clamps, 2pcs 12" bar clamps and 2pcs 6" spring clamps. 6" clamps are suitable for spreaders up to 11-9/64" and 12" clamps are suitable for spreaders up to 17-21/64"..Strong nylon body and high-quality hardened steel bar have good impact resistance and can fully withstand the high frequency of use at the construction site..Quick-change button design allows the F-Clamp to also function as a spreader. Just push the red button, remove the jaws, then reverse it and put it back in place to get the spreader you want..With up to 150 lbs of squeeze capacity and metal ratchet construction, our pole clamps are perfect for woodworking and home repairs. Lightweight yet strong and durable, it can be used for a long time..Pad features a flexible material and a non-slip texture that enhances the overall clamping force. The quick release design makes your functions easier. The ergonomic handle can provide customers with a more comfortable feel.