SELF-FEEDING TYPE; 3/8 INCH MIN. DRILL SIZE; 1 INCH MAX. DRILL SIZE; FORGED, HEAT TREATED PROCESS; 6 DRILL(S); 3/8 INCH, 1/2 INCH, 5/8 INCH, 3/4 INCH, 7/8 INCH, 1 INCH DRILL SIZES; APPLICATION DRYWALL, HARDWOOD, PLYWOOD, SOFTWOOD