Weaver's precision-built all steel bases are machined to tight tolerances for a custom fit and a square-cut notch mates to the sturdy cross bolt in every Weaver Detachable ring. Custom hardened fastening screws included. Fits: Anschutz 1568 (Rear base ONLY.)Cil Models 950 & 950-C (Rear base ONLY.)li>Ithaca Models LSA-55 & LSA-65Modern Muzzle Loading Knight Models MK-85, BK-92, & T-Bolt (Flat receiver)Sako Whitetail HunterSavage Models 10, 12 (but not 12 BVSS), 16, 510, 512, & 516 Short Action Rifle, 110 (E & S), 111, 112 (R, V, & FV), 116 FSS (Long Actions); 210 Shotgun - use X-high rings; Striker Pistol (Rear base ONLY.)Shilen Flat Top ReceiversStevens Model 110E (Rear base ONLY.)Tikka Flat Receiver Notes: Mounting hardware included.