Warne 30MM Quick Detach Rings Low Matte 213LMMaxima series rings are designed to mount on Weaver style and Picatinny bases. Made from the same process that Porsche and BMW use for their connecting rods, these mounts are strong. The finish uses a powder coating process that is used by Zeiss and Nikon on their scopes. The rectangular stainless steel recoil key is unique and has proven reliable under recoil. Features: Quickly detach and reattach the Maxima rings with no loss of zero. Square recoil control key for positive engagement of ring to base. Rings securely mount around scope using 4 Torx style T-15 socket cap screws. Specifications: Color: Matte. Ring Height: Low .250 inches. 30mm ring diameter. Contents: Warne 30MM Quick Detach Rings Low Matte 213LM.