STIHL 33RSC3-66 Oilomatic Rapid Super Comfort 18-Inch Saw Chain, 3/8-Inch Pitch, .050-Inch Gauge, 66 Drive Lengths 3/8-Inch rapid super chain 0.050-Inch gauge 60 Drive lengths Aggressive full chisel chain, but has a single-humped drive link to reduce kickback tendency Features excellent cutting and plunge cutting efficiency