The STIHL 11171602905 Clutch Drum is an authentic OEM replacement part designed for various STIHL chainsaws, including models MS 170, MS 180, 017, 018, MS 170 C, and MS 180 C. This crucial component facilitates efficient power transfer from the engine to the chain, ensuring reliable and consistent cutting performance. Manufactured to STIHL's rigorous quality standards, it provides a precise fit and long-lasting durability for maintaining your chainsaw's operational integrity.