LOCK AND SEAL – Grease coupler jaw design enables easy opening and closing of the grease fitting. Reinforced jaws and high-quality sealing gaskets ensure long-lasting, stable performance with no leaks even at 17,000 PSI. HIGH QUALITY – Made of refined iron for reliable all-weather indoor and outdoor use. ONE-HANDED OPERATION – Double-handle anti-slip design and smooth retract mechanism allow one-handed operation. Once locked onto the grease fitting, it remains open, freeing both hands for grease application. WIDE COMPATIBILITY – Fits standard 14mm, micro, battery-powered, pneumatic, and manual grease fittings. Also compatible with M6, M8, M10, M12, and M14 grease fittings. Replace your existing grease coupler. Color: Chrome Material: Iron Package Contents: 4 x Grease Nipples Note: Color may vary slightly due to lighting and screen settings. Measurement tolerance is ±1–3 cm.