Four Caps Give Double The Holding Power
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.
Big Book Catalog, Issue:69, Page:261
SPECS: Aluminum, gloss black, matte black, or natural silver finish. Height from top of base to bottom of ring: Medium - .160" (4mm). High - .328" (8.3mm). Standard and Extension (Ext) rings fit Weaver-style bases. Extension sets include one standard ring and one extension ring. Others have two standard rings. Tip-Off rings fit 3⁄8" grooved .22 rimfire receivers.