The LockNLube Grease Fitting Thread Tester is an essential tool for mechanics and maintenance pros. This compact anodized aluminum tester features nine different thread patterns to help you quickly identify the correct size for your grease fittings. Includes Metric sizes (6x1, 8x1, 10x1), SAE-LT (1/4"-28 Taper), UNF (5/16"-24), BSPT (1/8"-28, 1/4"-19), and NPT (1/8"-27, 1/4"-18) patterns. Its durable construction ensures long-lasting reliability in workshop environments. The clear labeling and organized layout make it simple to test fittings and identify the correct thread pattern, saving valuable time during maintenance work. This pocket-sized tool helps eliminate guesswork and prevents potential damage from using incorrect fittings. Perfect for automotive shops, industrial maintenance teams, and equipment repair facilities.