Leupold QR Winchester 70 Exp Pre-64 2-pc MatteLeupold QR mounts allow you to remove and reattach your scope and return to within 1/2" of the original point-of-impact. The patented lever mechanism, machined with precision tolerances, engages the steel base to the ring, pulling it down and forward and locking it into its “zero” position. You get ease, convenience, and field-proven, repeatable accuracy.Turn the lever forward and an eccentric on the lever shaft engages the base of the ring, pulling it down and forward on the base, locking it solidly into its “zero” position. The key is super-close machining tolerances at the heart of the patented lever mechanism.Leupold QR™ mount promises repeatable accuracy. Remove and reattach a scope using our QR™ mount and still return to within half an inch of the original point-of-impact on the target.