OREGON 72CK100U 100-Feet Reel of Super Guard Semi-Chisel Chain, 3/8-Inch Pitch Recommended saw size: 50 to 100cc, bar length: 16-inch - 33-inch (41-91cm) Semi-skip sequence: 72ck 3/8-inch pitch, 050-inch gauge New advanced grind geometry, significantly improves out-of-box sharpness, substantial speed improvement in boring and bias (undercut) modes Blued cutters provide superior corrosion resistance Tumbled parts, improved joint articulation, reduces friction and stretch