Workpro Mini Bar Clamps For Woodworking, 6"(2) And 4-1/2"(2), 4-Piece One-Handed 4-1/2" 6" Clamps Set: The set contains 2 pieces 4-1/2" bar clamps and 2 pieces 6" bar clamps. The 4-1/2" clamps can be set to spreaders of size up to 7-7/8", and the 6" clamp is also a spreader with size up to 11-1/4" Clamp Spreader: The unique quick-change button design allows the f clamp to be a spreader as well. Just press the red button to take the jaw off and then reverse it before putting it back in, you will get the spreader you need Powerful Clamping Force: With up to 150 lbs of squeezing force, WORKPRO bar clamp offers a decent choice for woodworking or other household repairs. It is lightweight yet sturdy and is capable of holding pressure for extended periods Solid Construction: Reinforced nylon body and high-quality hardened steel bars provide excellent impact resistance, which is able to withstand the heavy use expected on construction sites Eye for Details: Non-marring removable and replaceable pads feature flexible material and non-slip texture, which enhances the overall clamping force. Quick-release latch allows you to adjust and lock the wood clamps simply and quickly. Somewhat surprisingly, the ergonomically-designed handle and dipping plastic on the quick-release latch are both for customers' comfort