Jig Pins are removable locating pins, precision ground for accurately aligning holes. Similar to an L or T Pin, but with an integral shoulder to keep the handle raised, and with pin diameter ground .0003" under nominal size. To convert from a T handle to an L handle, slide the roll-pin handle by tapping it with a hammer. Available in pin diameters from 3/16 to 1/2" (5 to 12mm in metric). Made in USA.