? The ID Xpansion clamp is the ideal way to hold parts on an inside diameter for multiple machining on vertical or horizontal machining centers ? It can also be used as an expanding mandrel on a lathe ? The flange diameter of the clamp is held to a close tolerance for precision locating in a machined pocket on work cubes and fixture plates ? One of the benefits of these low profile clamps is holding many lathe parts, for secondary machining, on one compact set up ? They are quickly tightened with a hex key, torque driver or can be mated to hydraulic pull cylinders for automation.