An edge clamp is a processing jig that clamps parts and members using a wedge structure or eccentric cam structure. Double edge clamps can be tightened two at a time by placing objects on both sides. The object is strongly tightened by using a hexagon wrench for the wedge-type clamp. There is also a type that can be self-cut according to the target object. OK-vise is used by installing clamps and stoppers on the base, but in recent years there are many vises designed to be compact and suitable for processing small accessories. There are various types of stoppers, including flat types, types with V-grooves, types with diamond tips, etc. so it is necessary to select a product according to the target object. A combo rail with a set of clamps and stoppers can handle parts with unstable shapes because the two stoppers slide independently. The mode can be changed by replacing the clamp.