Yes it it. I bought mine 5+ years ago and its the last grease gun fitting I've purchased since. I used to go through about 1 cheapo fitting a year.
LNL Paid for itself the first time I used it in saved aggravation, no pulled out zerks, and all grease goes into the zerks instead of making blobs in front of the zerk.
LNL Paid for itself the first time I used it in saved aggravation, no pulled out zerks, and all grease goes into the zerks instead of making blobs in front of the zerk.