works like a champ. i found t works better than them 12 ,18 and 24 volt portables. i havent had a zerk fitting not except grease yet with the lock n lube coupling best ever i have fun greasing now. the gun is great not having to hold that heavy grease cartridge makes it easy to climb all over the units when trying to reach those hard to get to grease fittings and i only have the regulator on 40 psi this grease gun is the best i love it