Solid aluminum attachment for using a Dewalt Die Grinder as a lathe tool post grinder, fits BXA quick change tool posts. Reversible so you can grind the front or the rear of the workpiece. Steel knurled thumbscrew for height adjustment. Has a straight bore 1.615. If you have a different grinder, I can machine a different bore size. 2.75″ wide, 2.75″ deep, 1.875 tall.