Our exclusive “C” adapter is 6″ tall, and has a machined platform with two different dovetail widths. Use the narrow dovetail with any red-dot finder. The wider dovetail works with the Oberwerk Deluxe Multi-Reticle finder. The “C” adapter is manufactured by our local machine shop out of 3/8″ anodized aluminum, with stainless steel hardware. Absolutely zero flex with any 1/4-20 threaded binocular up to 6 lbs.