This site has limited support for your browser. We recommend switching to Edge, Chrome, Safari, or Firefox.

🚨 Pressure Return Valves - SHOP NOW

LockNLube was founded by farmers and loggers with the goal to End Greasing Frustration by creating tools that work better and last longer than anything else on the market.

Our tools are built to solve the unique challenges farmers face and stand up to the heavy use and demands of farming. LockNLube tools make farm equipment maintenance faster, easier, cleaner and less frustrating. Increase uptime, save time on routine greasing and tire inflation, reduce the cost of wasted grease, and prolong the life of bearings and bushings when you know that the grease goes in, not on, the machine.

Trusted by Farmers since 2013!

LockNLube® Grease Gun Coupler

End greasing frustration with the original locking grease coupler!


  • Locks on, stays on, won't leak. Rated up to 10,000 PSI

  • Easily disconnects, even under pressure. No more broken Zerks

  • 1/8" NPT compatible with all grease guns - battery, pneumatic, manual

  • Grease goes in, not on, the machine

  • Works on all Zerk fittings, SAE and metric

  • Includes a rebuild kit! The LockNLube® is the world's only rebuildable grease coupler. Lowest lifetime cost.

  • Patented Locking Technology. US Patent #8955544

  • As seen on TruckU on the Motortrend Channel!

$29.99

8-Piece Quick Connect Greasing Accessory Kit


Reach any grease fitting on any machine!

Eight quick-connect adapters allow access to hard-to-reach grease fittings. As seen on TruckU on the Motortrend Channel!


  • Includes:
    LNL120 - 90° Grease Coupler Adapter

  • LNL121 - Push-On 90° Grease Coupler

  • LNL122 - Narrow Needle Nose Dispenser

  • LNL123 - Grease Injector Needle

  • LNL126 - Quick-Connect Grease Hose Adapter

  • LNL127 - Seal-Off Grease Adapter

  • LNL128 - Recessed Fitting Adapter

  • LNL129 - Simple 90 Degree Adapter


Save 25% vs. buying all 8 separately!

$79.99

LockNLube Grease Gun Coupler XL

Over 3.5" of reach. Great for shielded PTO shafts, axles, harvester heads, U Joints and other recessed grease fittings.


  • Rated to 10,000 PSI! Locks on, stays on. Does not leak once locked on.

  • Hands-free - does not pop off under pressure.

  • Easily release from fittings with the thumb lever, even at extreme pressure.

  • No more broken Zerks

  • Fits all standard Grease Guns - 1/8 NPT fitting. Fits all SAE and Metric Zerk fittings. Simply replace your existing coupler.

  • Includes rebuild kit. Easily replace seal and jaws without replacing the coupler.

$39.99

Customer Reviews

“Greatest thing since the invention of the aluminum beer can ... won't own a grease gun without it.”

CHRIS C.

"I had a couple of pins on a tractor loader that I recently purchased that would not take grease. I used the grease buster on them and it worked exactly as advertised. The whole process for two fittings took 20 minutes from opening the package to grease fittings that work as they should. Great product!"

TIM B.

"I can’t explain how much I love this

chuck. I have been using different

gauges for years but this beats them

all. I would recommend this to

anyone who asks me.

I am so happy that I found this."

JOHN T.

x