General description Keep your chainsaw running like new with the AlwaysH 3/8' Clutch Sprocket Kit. This high-quality kit is designed to help you easily repair your chainsaw and restore it to peak performance. Each replacement part is a perfect match to the original part, ensuring a seamless installation and replacement process. Technical specifications Compatible with STIHL 017, 018, 021, 023, 025, MS170, MS180, MS210, MS230, MS250 Series OEM Part Numbers: 3/8 LP Pitch Spur Gears: #1123 640 2003 and #1123 640 2073 Clutch Assembly Replacement: #1123 160 2001 Worm Gear Replacement: #1123 640 7102 Compatibility and accessories Package Includes: 1 × Sprocket 1 × Clutch 1 × Sprocket Bearing 1 × Worm Gear 1 × Washer 1 × E-clip 1 × Spark Plug Installation Installation and replacement will be quick and easy.