General description Compatible with STIHL 017, 018, 021, 023, 025, MS170, MS180, MS210, MS230, and MS250 chainsaws, this 3/8' Sprocket & Clutch Kit is designed for easy installation and replacement, ensuring your chainsaw operates smoothly and efficiently. Technical specifications Spur Gears pitch: 3/8 LP Part Numbers: #1123640 2003, #1123640 2073 (spur gears), #1123160 2001 (clutch assembly), #1123 640 7102 (clutch gear worm gear) Installation Each replacement part perfectly matches your device, making installation quick and easy when using original parts. Usage This kit is essential for maintaining the performance of your STIHL chainsaw, ensuring that all components work together seamlessly for optimal operation.