LOCK AND SEAL - Grease coupler jaw design allows for easy opening and closing of the grease fitting. Reinforced jaws and high-quality sealing gaskets ensure long-lasting, stable performance with no leaks, even under extreme pressure up to 17,000 PSI. High Quality - Constructed from premium refined iron for reliable all-weather indoor and outdoor use. Durable and stable performance in various conditions. One-Handed Operation - Double handle anti-slip design combined with a smooth retract mechanism enables easy one-handed operation for quick installation and removal. Once locked onto the grease fitting, it remains open, freeing both hands for grease gun operation. WIDE APPLICATIONS - Compatible with standard 14mm grease fittings, including micro, battery-powered, pneumatic, and manual grease guns. Fits M6, M8, M10, M12, and M14 grease fittings. Easily replaces existing grease couplers. Material: Iron Color: Chrome Package Contents: 1 x Grease Nipple Note: Other products are not included. Light reflection and differences in display settings may cause slight variations between the color shown in the image and the actual item. Measurement may vary by +/- 1-3 cm.