LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, not on the machine. World’s best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable tool.

Amazon.com Price: $29.99 (as of 08/05/2021 18:33 PST- Details)

Locks on, does not leak
1/8″ NPT compatible with all grease guns – battery, pneumatic, manual
Grease goes in, not on, the machine

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