As the face of these plungers is pushed in, the internal spring applies outward pressure to hold a workpiece in position against stops and rails.

As the workpiece pushes against the pin head in one direction, the internal spring pushes back to hold it in place for clamping.

Threading makes these guide pins easier to remove and replace than press fit, so they're useful for high-wear applications.

Thread in a screw, handle, or other part to create the right size and shape guide pin for your application.