Tactical Rifles' Chimera Tactical 30mm Rings are lightweight yet strong and provide excellent scope retention and reticle alignment. Each ring provides 3.75 square inches of clamping area, for a total of 7.5 square inches per set. Precision boring technology holds alignment at +/-0.002 inches, and the scope cannot twist when torquing rings, as caps are torqued only on one side after alignment has been set.