The screw design with wrench makes the operational simple, and users can easily adjust the spacing of tenons by turning the wrench, thus adapting to different size of wood Simple and practical, and the screw is equipped with a wrench, which is for users to adjust the tightness, and can firmly clamp the wood to ensuring that the wood will not during cutting, grinding and other operations Suitable for desktop woodworking, both amateurs and professional can use this set of tool for accurate wood processing Selected from metal, which have durability Metal can withstanding greater pressure and is not easy to deformed, so it is suitable for carpentry for long time 19mm and 20mm size design enables all parts to cooperate well, ensuring the stability and reliability of the vise in use, Manufacturer: HDOYTXXM