20BC14U01 up for sale is a lot of machine shop and hobby use grinding wheel mounted points for shaping metal and other materials , these have a 1/8 shank x 1 3/4 long the tapered cone is 1/4 major OD x 1/4 long tapering back to 3/16 diameter , red abrasive see photos for grade . New tips from our surplus warehouse , these come loose as shown in the photos , new tips,