The HOLT INDUSTRIES™ locking grease coupler features a universal fit to work with all types of grease guns. Built for professional use this heavy duty locking grease coupler offers a 3 jaw construction to help with better alignment, hands free and  leak proof greasing, ergonomic palm lever to engage and disengage coupler under high pressure, heat treated spring steel jaws designed to fit SAE and metric grease fittings and universal fit designed to work with all types of grease guns.