The Milwaukee® right angle grease coupler provides a high quality replacement for a worn coupler. It fits the Milwaukee® 2646-20 grease gun and upgrades the standard coupler to right angle functionality. This right angle grease coupler may fit competitive brands' grease gun models. It's strong enough to handle your most heavy duty machine and hardware lubrication projects. The coupler's exceptional durability matches that of your Milwaukee® grease gun to provide you with long lasting high-quality performance for upto several years of work. Use a 9/16 in wrench to ensure that you screw it on tight enough to handle the grease flow. It's ideal for heavy machinery, tools, hinges and more. Milwaukee® M18™ Grease Coupler, Right Angle, For Use With: M18™ 2646-20 2-Speed Cordless Grease Gun, Specifications: 1/8 in NPT, 9/16 in Fitting Wrench, 10000 psi, Metal