TAPER, SPLIT POINT TYPE; HIGH SPEED STEEL MATERIAL; 1/4 INCH DIAMETER X 3-1/2 INCH LENGTH OVERALL SIZE; PILOT DRILL BIT; HOLE SAW USED ON ITEM; 49-56-7210, 49-56-7010, 49-56-7000, 49-56-9100, 49-56-7250, 49-56-7240 USED ON PART NO; THUNDERBOLT[R] BRAND