Lock-N-Lube Adapter Secret Instructions

We use the Lock-N-Lube grease coupler daily. We have a few fittings that the original coupler will not work on. We got these Lock-N-lube adapters to take care of those joints without having to get out another grease gun. There are several negative reviews we found on these couplers, and we think we found the issue and how to overcome them and let you in on the "secret" instructions. Not really a secret but they don't include these instructions in the packaging. Great product and great adapters, we are a fan! Have a great day and be safe!