Two caps per base provide twice the clamping power. 210° coverage provides even clamping pressure that pulls scope into base, prevents scope from rotating when tightening caps. Aluminum construction keeps weight to a minimum.
Height from top of base to bottom of ring: High - .328" (8.3mm).
Extension (Ext) rings fit Weaver-style bases.
Extension sets include one standard ring and one extension ring.
High Extension - Fits up to 44mm Objective Lense