LOCK AND SEAL – Grease gun 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 convenient one-handed operation. Once locked onto the grease gun accessory, it remains open, freeing both hands to operate the grease gun. WIDE APPLICATIONS – Compatible with 14mm standard, micro, battery-powered, pneumatic, and manual grease guns and fittings. Fits M6, M8, M10, M12, and M14 grease fittings. Direct replacement for existing grease gun couplers. Color: Chrome Material: Iron Package Contents: 2 x Grease Nipples Note: Color may vary slightly due to lighting and screen settings. Measurement tolerance: ±1–3 cm.