Does this work with Milwaukee grease guns?

This does not work on the older Milwaukee m18 grease guns. They used a metric threaded hose on the older ones. The newer guns have standard thread and it will fit those. Take the current connector off the end of your grease gun hose. If the first 1/8 inch of the hose is not threaded, then you have a metric hose and this lock lune will not fit.

Where is this product manufactured?

It is a quality product made in South Africa by Gurtech.

After installing it, I couldn't depress the gun's pump. What did I do wrong?

Between myself and friends we have successfully installed five of these fittings without any problems. As per the other reviews, I would first check your gun to see if was in fact pumping grease, then reinstall the coupler and try again, before you put it on a fitting. Could be that the fitting jerk that you tried it on was frozen. If it still does not allow grease to flow, it is defective and you will need to return it.

It is just the fitting or does it include the flexible line?

It is just the fitting. The hose was included to give context and sense of scale.

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🔧 Lock it, grease it, forget the mess—your machine’s new best friend!

MESS FREE MASTERY - Eliminates grease waste and machine mess with a tight seal that stays put under pressure.
UNIVERSAL COMPATIBILITY - Fits all 1/8" NPT grease guns—manual, pneumatic, or battery-powered—upgrade any setup instantly.
QUICK RELEASE CONVENIENCE - Thumb lever design lets you effortlessly lock on and release, even on stubborn or pressurized fittings.
LOCK LOAD WITH CONFIDENCE - Patented locking mechanism ensures a leak-proof, hands-free grease application every time.
BUILT TO LAST REBUILT TO SAVE - Includes a spare rebuild kit—double the value, double the durability for multi-year use.

The LockNLube Grease Gun Coupler is the world’s best-selling original locking grease coupler, engineered to lock securely onto all Zerk fittings and rated for up to 10,000 PSI. Its patented sliding sleeve mechanism provides a leak-proof seal that frees both hands for efficient greasing. Compatible with all 1/8" NPT grease guns—manual, pneumatic, or battery-powered—it includes a spare rebuild kit for extended tool life, making it the ultimate upgrade for professional maintenance and machinery care.

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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Manufacturer	LockNLube
Brand	LockNLube
Model	LockNLube Grease Coupler
Product Dimensions	8.76 x 1.6 x 4.22 cm; 113.4 g
Item model number	1/8\\\" NPT
Manufacturer Part Number	GC81011
Item Weight	113 g

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.

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