Our QD 35mm Tactical steel low rings are Made in the USA. Saddle height is 1/4 inch. The quick detach lever design is engineered for repeatability, reliability and ease of use. Levers have 6 position index and 4 T-15 torx screws each. The levers are anchored by solid steel crossbolts, to eliminate any chance of coming loose on the base or brake under heavy recoil. Heights are: Low (1/4 inch), Med (1/2 inch) and High (3/4 inch) measured from the top of the base to the bottom of the ring. Exceptional precision and a beautiful finish.