Take the struggle out of trying to grease flush or hydraulic type fittings on vehicles and farm equipment with the STEELMAN 06132 . Attaching to any standard grease gun hose or extension, this coupler lets you access flush or hard to reach hydraulic type fittings inaccessible by regular couplers. The adapter’s 4.75-inch length allows it to double as an extension to reach past obstructions and to deep set zerks. A locking sleeve on the base of the adapter helps secure it to existing push-on grease gun couplers.