I use 6-32 bolts to fasten mine on. I had a dead stick and broke the bolt..the gear was still fine. I don't have a fuse ripping problem since I have a hardwood block mounted where both of the bolts go thru the fuse. I also staggered the bolts where the one on bottom has more meat in front of the bolt and the one on top has more meat behind the bolt.

Funny thing..when I sent Jeff the Email to order the set for my OMP 540, I told him I liked the gear because they were so much stronger than I had imagined. Different strokes, I reckon.