Quick Change - 0.3125" (5/16) Bore DIA x 0.5000" (1/2) Shank Height x 4.80" Overall Length x 0.875" (7/8) Collar DIA
0.3125" (5/16) Bore DIA x 0.5000" (1/2) Shank Height x 4.80" Overall Length x 0.875" (7/8) Collar DIA - Quick Change - Grinding Holder Square