Maxima Bases also offer a full width recoil slot in each base. This feature allows the recoil control keys of Warne Rings to attain maximum bearing surface. Maxima M902/876 Fits Remington 700, Howa 1500, Weatherby Vanguard&Series II, Nosler M48 Features Low profile design allows use of iron sights when optics are removed. Full width and depth recoil slots provide maximum bearing surface for recoil key engagement. Bases securely mount to your firearm with Torx-style T-15 socket cap screws, 25 in/lb. of torque is recommended. Instructions Visually inspect your firearm's receiver for burrs around the screw holes and remove if necessary. Remove all oil and grease from the holes in the receiver, the base screws and contact surfaces. Place the scope mount base(s) on the receiver. Check for proper fit and alignment. Using a T-15 wrench (supplied with WARNE rings) loosely install the supplied Torx 15 screws. If base(s) fit properly, firmly tighten screws.* WARNE recommends 25 in/lb torque. *WARNE recommends the use of a REMOVABLE thread locking compound for best results.