These rifle scope bases by Warne may have more than one cross-slot to offer multiple position options for the ring. They are precision CNC machined from solid steel and are held to very tight tolerances. The Maxima Steel Base design by Warne is modeled around the popular Weaver design which is one of the strongest and most versatile mounting systems available today. The low profile of the Warne Maxima Steel Bases give your firearm a sleek good look. Riflescope bases by Warne are machined from solid steel. Warne tactical bases provide a strong and true platform for optics mounting.