CONSTANT PITCH TYPE; CEMENT BOARD, CERAMIC TILES, FIBERGLASS, CAST IRON, WOOD CUT MATERIAL; CARBIDE TIPPED BLADE MATERIAL; 4-1/4 INCH DIAMETER; 1-5/8 INCH CUTTING DEPTH; NO SUPPLIED WITH PILOT DRILL; STRAIGHT ARBOR SHANK TYPE; THREAD SIZE 5/8 INCH-18 TPI