For Remington 700: Also fits the Remington model 721 and 722 & Bergara B14. Right-hand mount fits right hand firearms and left-hand mounts fit left hand firearms.MOA Mounts are tapered down on front for long range shooting. Height will be about .03" lower on front ring than a standard mount.Base screws are 6-48 X A 1/4" long. Ring screws are 6-40 X 5/8" long. Both use a 7/64" Allen wrench.Some of the .338 Lapua receivers have been modified at the factory and have larger base screws. The size of them is 8-40 and will use a 9/64 Allen wrench. Check your gun and see because the mount will have to be modified. Choose Model 700 (8-40 screws) if your gun uses the larger 8-40 screws.Short action - Outside to outside of rings is 4.26" for standard ring mounts. Standard rings are .63" wide and have 2 ring screws per ring. Tactical rings are .80" wide and have 4 ring screws per ring. 4 Hole to hole spacing dimensions are .86" 3.63" .60". Height of mounts from top of receiver to centerline of scope tube is - low .98" medium 1.11" and high 1.23".