Product: Plews 05-037 Grease Injector Needle
Overall sentiment: negative
Customer reviews:
Horrible piece of crap!

This was super disappointing, it's about as strong as a tiny paper clip AFTER you've bent it back and forth a bunch of times
Save your money and get the other one that's 18 gauge 
 Probably good for poking through a rubber boot, but definitely cannot be used with needle grease fittings like on u-joints.  It bent just trying to get it in the fitting.  Also when I tried to take it out of the grease gun it pulled apart.  Ended up having to take the fitting on the gun apart to get the remaining piece out of the gun. 
 First time I tried to use it it snapped while inserting into the grease fitting. Really thin metal and not strong enough. 
 It broke on the first try. 
 Worked couple of times then bent 
 Bent  immediately. 
 Broke in the first 30 seconds of trying to use it.  Fail. 
 Works once. The force needed to disconnect from the grease gun will separate the parts. The zerk is just press fit into the needle. This need a major redesign to include a threaded sleeve or coupler to accept the zerk and attach SECURELY to the needle. Then there would be something to grab a hold of and it wouldn't just fall apart into 2 pieces. 
 Not too good. Seems to be one time use. 
 Broke first use