Durable Material: The is made of high-quality malleable steel material, high temperature resistance, high hardness, sturdiness and durability, can be used for a long time, and has sufficient impact resistance. The soft jaw cushion will not scratch or damage the surface of the workpiece. Quick Sliding Design: The grooves on the serrated bar make it easier for the movable jaw to slide. So that materials of different widths and thicknesses can be tightened immediately. There are knurls on both sides to prevent the jaws from falling off. The screws and chucks are covered with soft and durable plastic pads to protect your work piece. Soft & Scratch Resistant: There are 2 soft plastic covers on the teeth of this heavy-duty F-clamp, which can prevent the wood from being damaged due to excessive pressure and ensure that the wood is clamped tightly. The ergonomic wooden handle can definitely save your hand strength and provide excellent grip. Two Different Sizes: This woodworking clamp has two sizes, 50*200 and 80*300mm. The surface of the steel plate is polished, which can effectively prevent rust. The front and rear double-sided tooth pattern design. The tooth bar is clear and neat, which can effectively prevent slippage. You can Choose according to your needs; very flexible and personalized. Time-Saving Choice: This set of heavy-duty F clamps is suitable for heavy-duty clamping projects and a wide range of light-duty woodworking, cabinets, metalworking and other DIY needs. These tools are suitable for all types of people. It is a practical hand tool for woodworking, which can splice small wooden boards into larger ones. Widely used in wood bonding and splicing to clamp and fix wood.