The Lumax Heavy-Duty Quick-Release Grease Coupler, No. LX-1403-XL, is designed with a proprietary locking and quick-release mechanism, which creates a leak-proof seal, says the company. The design enables the quick release coupler to firmly latch onto the grease fitting, enabling handsfree greasing. If a fitting becomes pressurized, technicians can just depress the thumb lever and release the coupler. The coupler has an integrated 1/8” NPT Connection and is suitable for use on most hand, battery-powered, or air-operated grease guns and bulk grease pumps.