The Vevor grease gun coupler set is designed for fast, secure lubrication with compatible 1/8" NPT grease guns. Its 3-jaw locking design helps maintain a tight connection under pressures up to 10,000 PSI to reduce leaks and accidental disconnects. The compact body makes it easier to work in tight spaces, while the one-hand operation simplifies attachment and release. This 2-piece set also includes useful accessories for cleaner, more efficient maintenance tasks.