The Lever Lock mount makes mounting and dismounting your rifle optics easy, without toos and with no loss of zero. Ideal for mounting on rifles like "flat top" AR's. With your scope mounted in the Lever Lock Mount, just turn the leer to open the base clamps, and slide the Lever Lock mount onto the rifle's rail. Lock the lever back and your scope is clamped on with rock solid force for a no-movement installation. For removal, just turn the lever to open the clamps and slide your scope and mount off its rail. It's just that easy. It fits any one or two piece Weaver style or Picatinny Rail. It has a side-mounted tension adjustment which also accommodates varations in rail widths. There are twelve top rail mounting slots to allow you to adjust your optics placement just right. The wear surfaces are heat-treated steel. Two 30mm rings are included.