HRH-2X-737 Deluxe AIR Hammer KIT for Rivets. Includes: 2 BUCKING BARS, 4 CUPPED UNIVERSAL HEAD BITS 3/32, 1/8", 5/32" & 3/16", 1 FLUSH BIT WITH A 1" DIAMETER, 1 FLUSH BIT WITH A 1-1/4" DIAMETER WITH RUBBER RING, 2 RETAINER SPRINGS, A BRASS REGULATOR, AND AIR TOOL OIL.