Maxima Quick Detach Rings are the most durable and versatile quick detachable mounting system available. Each ring is precision CNC machined from sintered steel technology, a process that allows intricate steel parts to be formed and then fired retaining the strength properties of steel while adding the necessary ductility that scope mounts require for perfect grip contact around the circumference of the scope. The Maxima QD rings sport the unique Warne indexable lever system which allows the user to remove the optics from the rifle then reattach it without the loss of zero, as well as allowing the location of the lever to be indexed once the rings are affixed to the bases. After Mfg: Warne Mfg. Company SPECS: Steel, powder-coated black or nickel plated. All available in polished (Reg.), Matte finish or Silver, matte finish. Height measured from top of base to inside bottom of ring. Available in Low, .250" (6.35mm), Medium, .375" (9.5mm), High, .525" (13.3mm).