Browning a bolt mounts: base screws are 6-48 x 1/4 long.Ring screws are 6-40 x 5/8 long.Both screws use 7/64 allen wrench.Super short action outside to outside of rings is 3.84.Standard rings have 2 screws per ring and rings are.63 wide.4 hole to hole spacing dimensions are.86, 3.02,.56.Height of mounts from top of receiver to centerline of scope tube is medium 1.06.Fits right hand firearms.These mounts are precision machined and custom made to fit and align perfectly with your rifle receiver.The mounts absorb shock and withstand temperature extremes better than steel mounts at a fraction of the weight.Made in the usa.

Tube Diameter: 1"
Height: 1.06"
Finish: Matte
Material: 6061-T6 Aluminum