Description Product Reviews Klein 1-3/8” Carbide Hole Cutter 31860 Cuts quick, precise holes in stainless steel, mild steel, iron, copper and brass sheet up to 3/16” (5 mm) thick. Split point pilot drill bit prevents bit walking. Integrated flange prevents the operator from drilling beyond the sheet metal. Conduit and pipe sizes: 1” (25 mm). Uses replacement pilot bit 31874. 0 Reviews Hide Reviews Product Reviews