I have been using this brand for 10 years on my personal rifles.
TSR 7075 aluminum rings precisely machined from an aluminum billet, giving maximum scope/ring contact. Holds scope securely against recoil. Four-screw cap lets you align the reticle, tighten the left side of the cap, then the right side without the scope rotating. Radiused edges and corners help prevent snagging. Large, clamp-nut lets you torque rings to Mil-STD 1913 (Picatinny) bases.
SPECS: 7075-T651 Aluminum Alloy, matte black, hard anodized to Mil-A-8625 standards. 5/8" (15.8mm) wide.
Height measured from top of base to center of ring.