"This Oregon saw chain is a high performance product designed for professional users. Chain Type 21LPX, Chain Gauge in. 058, Length ft. 100, Chain Pitch in. 0.325. High performance chains are designed for professional users Top performing square corner 'chisel' cutters sever wood fibers in a single pass Upgraded cutter grind results in significantly enhanced out-of-box sharpness Corrosion-resistant chains include bumper drive links to reduce kickback and vibration"