39 lb Tamper-Backfill With 6” Butt - 1450 BPM Chicago Pneumatic backfill tampers quickly and effectively compact soil around foundations and other structures and are indispensable for compacting backfill in trenches. • Maximum power—slow, powerful blows efficiently and quickly compact all types of backfill, including clay and soils containing high percentages of finely crushed or powdered material • Heat-treated cylinder and chrome plated piston significantly extend tool life • Adjustable packing maintains a positive air seal • Aluminum butt held with clamp screw for quick, easy replacement • Exhaust deflector directs air, moisture and oil away from operator • Integral oiler continuously lubricates tool during operation • Well-balanced, smooth-operating tool is easily guided by one person • 1 /2” (NPT) air inlet thread • CP 0035 has built-in muffler