Riser can be adjusted incrementally via two locking screws from 0.87 of rise up to 1.14 inch of rise, measured from rail surface to rail surface.Attaches and detaches quickly and securely via adjustable tension quick release mechanism. Available in 7 slot/3.5 inch versions for application with all scopes, red dots, and optics. Mounts on top rail or picatinny style rail 1 inch riser Strong Durable Construction Q-D Mount Height & Tilt Adjustable