The difference between the mouth and the mouth of a vise
Open a V slot, the rod is used to clamp the workpiece, thereby clamping force is good, but also easy to locate..... In a word, the regular vice jaw can be their own products processing, and can replace (screw hole and positioning is the standard uniform)
This is designed for finishing and clamping, because the workpiece has been rough processing, the surface is relatively smooth, so that the contact surface is large, clamping effect is good ~ there are some special shaped jaw
In fact, the mouth is prepared for rough processing, the workpiece itself has a rough clamping surface, so that the actual clamping force is better