LockNLube® Grease Coupler

End greasing frustration with the original locking grease coupler! Locks on, stays on, won’t leak. Rated to 10,000 PSI – Patented locking jaws grip the Zerk to create a secure, leak-free seal that will not pop off under pressure, enabling true hands-free greasing and cleaner lubrication. Easy release, even under pressure. No broken Zerks – Thumb-activated sleeve locks and unlocks quickly with one hand, disconnecting safely without pulling, fighting, or damaging grease fittings. Universal 1/8" NPT compatibility – Fits all standard grease guns including battery, pneumatic, and manual models, making it an easy, reliable upgrade for any grease gun. Grease goes in, not on, the machine – Internal seal directs grease into the bearing instead of leaking around the fitting, reducing mess, waste, and cleanup while improving lubrication. Works on all Zerk fittings, SAE and metric – Designed for universal fit across standard grease fittings for dependable performance on automotive, agricultu