The FatBoy Tripods M-Lok Arca Rail Mount is a high-quality locally-sourced solution for attaching a rifle or spotting scope cage to your tripod. Designed and manufactured in the USA the M-Lok Arca Rail Mount is made with the finest materials and is designed to be mounted to 1.5/38mm Arca-Swiss tripod clamps. Try it out for yourself and experience the convenience and versatility of the FatBoy M-Lok Arca Rail Mount – Specifications: – Length 5 – Width 1.5 – Catch Stop 3/32