Konus cantilever mount * universal adjust height/length FEATURES:Adjustable length Adjustable height Suitable for Weaver/Picatinny rails Integrated rail system for accessoriesAdd or remove the internal rings in order to switch from 1" to 30mm diameterAllen Key included Other Features: Adjustable length & height, suitable for weaver/picatinny rails,add or remove internal rings to go from 1" or 30mm,7 different settings