The attached photo shows an easy to make, less than half a day, tool post grinder for the Sherline. A two and a half inch length piece of 3/8" square cold rolled steel, faced off and with a 45 degree edge is strapped to the body of an pneumatic pencil grinder. The straps are worm screw 5/16" clamps on each end of the bar. The grinder is a Astro Pneumatic Tool Co. device. It turns 58,000 rpm. Thats way more rpm than needed for any project. The max psi is 90, but runs best at 60 psi. The silver band on the back of the grinder is an off/on speed control. The grinder is for light weight grinding, shaping and polishing and takes the 1/8" diameter shaft attachments. . The grinder is set up in a Sherline adjustable tool block, for 3/8" cutting tools. With a protractor any angle can be set up on either side of the work or head on.