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Reliable Tool for R12 Valve Core ServiceThe Mastercool 91290 Universal Valve Core Remover is a compact service tool for R12 and R134a systems, ideal for use during system evacuation or repair. With a double-ended design, this tool includes hardened steel shafts for Standard and GM Large Bore valve cores—making it a great choice for older vehicles and GM applications.Designed for non-pressurized systems, the 91290 delivers durability, simplicity, and excellent value in a technician-friendly format.What's Included:Dual-ended valve core remover/installer toolHardened steel shafts for Standard and GM Large Bore valve cores ✔️ Designed for GM and R12 Valve Cores – Services two of the most common core types used in older systems. ✔️ Double-Ended Design – Easily switch between shaft sizes for fast service. ✔️ Non-Pressurized Use – Ideal for system repairs, retrofits, or recovery applications. ✔️ Built to Last – Rugged steel shafts for reliability in everyday shop use. ✔️ Compact and Technician-Friendly – Lightweight tool that fits easily in your hand or pocket. ASIN B000O823XA Brand Mastercool Model 91290 Item Weight 0.8 ounces Manufacturer Mastercool Item model number Standard/GM Large Bore – R12 Product Dimensions 2.2 x 0.9 x 2.3 inches Manufacturer Part Number 91290 Is Discontinued By Manufacturer No