Someone barrowed my spanner wrench awhile back and of course didnt bring it back. (To remove Freefloat Handguards off AR's) Does anyone make one that's kinda universal? I realise most of the jam nuts are different sizes depending on the MFG and I have no Idea who made mine (I'm sure I barrowed it from someone) But it worked on most of em, I gotta start locking my garage!