Konus' Steel Ring Set with QD is constructed of a high quality steel with a quick release system and are ideal for mounting your riflescope. They are suitable for Weaver/Picatinny rails. This model has a 30mm diameter and a high mount height.A complete assortment of high quality steel mounting rings for riflescopes. These rings are suitable for weaver/picatinny rail. They are also supplied with the quick release system - a lever for quick attach and detach. Features: Durable steel construction Heavy-duty Torx screws Square recoil lug Quick release lever system