Quick view DNZ Dnz Game Reaper, Dnz 11042 Trad Blk Powder Md Mt $58.95 Base screws are 8-40 x 1/4 long.Ring screws are 6-40 x 5/8" long.Base screws use a 9/64 allen wrench.Ring screws use a 7/64" allen wrench.Outside to outside of rings is 3.92".Standard rings are.63" wide and have 2 screws per ring.(4) hole to hole spacing... Compare Add to Cart