Collet Blocks are a staple in many machine shops. What makes this block unique is that it can utilize 16C collets up to 1-5/8" diameter. A typical 5C collet is limited to 1-1/8" diameter. All of our 6" vises and bigger lathes were currently in use. You can get a sense for the scale of 16C in a 4" vise and the old South Bend Lathe. 😅 The ability to use a collet to hold a workpiece is beneficial in many ways. Runout is very low in a collet setup, making repeatable clamping easy. The full grip of