Review on JIFETOR Diagnostic Household Refrigerant Adjustable Tools & Equipment : Air Conditioning Tools & Equipment by Ryan Dillon

Yes, yes, that was it. And I sent the product back. Listen, you know what it is and why you need it. Well - connected to the car and the compressor. Vacuum off, gauges off, hold -30 inHg for 60 minutes. All is well. It's time to add R134a. That's where it ends. The adapter that fits onto the refrigerant bottle has a clip on the side. A little dated by today's standards, but that also means you can't use self-closing jars. It is necessary to pierce the old one once - use everything - and release the canisters in the air. Then screw the valve into the side clamp with a spike. Guess what? Like other reviewers, this pen is NOT CENTERED. So the bank doesn't drain well/at all. ok, then maybe try another one? Well, now you've wasted 2 cans of air. Okay, so go to your local auto parts store and BUY a real brass screw valve/can punch with eco-friendly self-sealing cans. Check over. Then come back home. Please note that the gauge set *&^%$#@ is a different size/threaded yellow inlet hose than the canister adapter. Ah, I read that too. Return to the Auto Parts Store. Get a "free rental" of their measurement kit. he fits Finish refueling the air conditioner on the machine. That being said, take this set of Jifetor gauges and wipe them down, carefully place them back in the shipping container and ship them back to Revain. Better yet, don't even try to buy them. Get a "free rental" at an auto parts store and save yourself the hassle. YMMV.