16" .325" Pitch .063"Gauge 67 Drive Link Stihl Rapid Duro 3 Carbide Chain Applications: The RD3 chain is especially suited for cutting dirty wood, treated wood, roots and hardwoods. The first STIHL carbide-tipped .325" saw chain stays sharp up to four times longer than standard chains. In addition, the STIHL RAPID Duro 3 is a low-vibration chain with a reduced kickback tendency. Fits a 16" Bar, 67 Drive Link, .325"Pitch,.063"Guage