The Vevor grease gun coupler is designed for use with grease guns that feature 1/8" NPT fittings, including manual, electric, and pneumatic models. Built from spring steel and #45 steel with nickel plating, it is made to handle pressures up to 10,000 PSI while maintaining a secure, leak-resistant connection. Its compact size and one-hand locking design help simplify lubrication work in tight or hard-to-reach areas. The included hose, cleaner, and extension needles add versatility for different maintenance tasks.