BARSKA Dual Cantilever Ring Mount, 1-Inch Includes 4 heavy-duty screws One piece ring mount that allows for extra mounting room for almost any 1'' optic accessory. 4 heavy duty screws keep the optic in place. Rail Type: Picatinny/ Weaver-I2.48-Inch each Materials: Aluminum with Black Matte Finish 1 Year Limited Warranty