Dear customer, Thank you for choosing our products. If there is any problem with our products, please contact us through the order information. We will be happy to serve you and solve it for you as soon as possible within 12 hours, thank you Quick Grip Clamp MaterialOur quick grip clamp is made of plastic and aluminum alloy, sturdy and durable. Heat-treated black oxide steel I-beam - withstands extra pressure with less bending and flexing for superior durability. One-Handed ToolOne-handed quick release, new handle and trigger design allow for easy one-handed operation. Non-damaging removal handle pads for converting to a spreader, ideal for all types of home improvement projects. Proper DesignThe handle with a pinch release is comfortable to hold. Press the quick release to slide the arm to the desired length. The handle design is perfect for bringing this pliers to the right pressure. Easy to UseEasy to use, slide your arm and hold the wood in place. Widely used in furniture manufacturing and packaging industries. A practical hand tool for woodworking, with which small wooden boards can be transformed into larger ones. How much torque can the pliers provideMaximum spacing of pliers is up to 4"4 inches: 11 kg / 24 lbs Can easily reverse the jaws and turns the pliers into an expanding pliers or as an extension tool.