I think these are the best locknuts I have used. I am using these on my TLR 22T and 22SCT because the plastic insert kept coming out of the nuts the first time I would use them on the TLR nuts. I bought a bag of the TLR nuts (I think 6 came in it) and I installed 4 brand new ones and 2 of those the plastic insert came out the first time I threaded them on and had to throw them away and get 2 more new ones out. I definitely recommend these. I just wished they offered them in black.