Professional Made-High performance carpenter clamps are made of high quality tool steel and are rust resistant and durable.Not only can they withstand the heavy use of the construction site, but also ensure that every use is more safe and durable. Thoughtful Design- There are two soft plastic covers on the jaws of these joiner clamps, which can effectively protect the surface of the object from damage due to excessive pressure. It can also avoid scratches. At the same time, ensure firm clamping to prevent slipping. Non-slip thread design- the F screw clamp adopts the trapezoidal thread design, the clamps with deep thread which can ensure that the gear does not loosen once it is fixed, and it can also increase the sliding time and service life. Save time and energy - The quick joint clamp is characterized by large clamping distance and labor saving. Ergonomic handles make work more comfortable and easy. It is a handy tool, widely used in woodworking, and can be used for gluing and splicing wood for stretching and fixing wood. Widely Used- The package includes 2 Bar Clamps (2 different sizes: 50mm x 200mm, 80mm x 300mm), you can choose according to your needs. Mainly used by carpentry, metalworking and DIY enthusiasts.