Seekins Precision rings are built to withstand the demands of serious shooters without the extra weight of steel. The popular Slimline clamping system uses two of the same grade 8 Torx™ screws to tighten the side clamp onto the picatinny rail. The slimline clamping system gives the shooter a slim, snag free setup that easily slips in or out of a scabbard, drag bag, or Eberlestock pack system. Guaranteed for life!