Musiclily Basic ミリ規格 3mm 鋼製 六角レンチ アーレンキー Floyd Roseエレキギターのロックナット用 ニッケル(2本セット)

They're 3mm allen keys. Seem hardened and not going to become mis-shapen like cheaper ones.

I use this to calibrate my ditting 807 lab sweet grinder. it's the right size and work as intended.

They do the job.

I put one of each in 2 Guitar Cases with Guitars I have Floyds on. They fit the top Nut locks fine.