I was so happy to get my MDT Premier scope rings and then I found out they use 9/64" allen and it is an oddball allen / My Fix-it-sticks rifle and optical kit does not have 9/64" nor does my Fat torque wrench kit. I gues I will have to go and find one at the hardware store, (if they have one). Probably end up ordering one of the interwebs. Just put a 9/64" allen key in the box we can use to torque instead of a regular allen wrench, Please. Scope rings are well built and will be great for my hunting rig though.