SpecificationFor hard-to-reach grease fittings on cars, trucks and equipment. Ideal for lubrication of late model front wheel drive vehicles. Complete with both small and large sleeves to fit all standard couplers. For hand operated grease guns only. Recommended working pressure is 4,500 PSI.Carded. 5 per master.Plews/LubriMatic grease fittings are precision engineered to withstand the rugged use of most automotive, farm and industrial applications.