The STIHL 39730000056 Rapid Super (RS) 26RS saw chain is a high-performance, full chisel chain designed for professional use. Featuring a .325" pitch and a 1.6mm (.063") gauge, this chain is engineered for fast cutting and excellent chip clearance. It has 81 drive links and is typically recommended for 50cm (20") guide bars. The 26RS designation indicates a specific chain type within the Rapid Super series, known for its robust construction and aggressive cutting performance, making it ideal for felling, limbing, and bucking in demanding applications.