UTG Pro 34mm POI (Precision Optics Interface) Medium Picatinny Rings Made in the USA 34mm Picatinny scope rings Medium profile Precision machined, aluminum and steel construction finished with hard coat anodizing Integral squared recoil stop Low-profile torx locking slide plate with dial spring-loaded guide rods Live fire recoil repetition tested Inner ring surface is precision machined 22mm width Includes: 2 ring pieces, each equipped with 4 torx screws Note: We recommend to tighten the ring top screws with a torque value of about 25 inch-lb and the side screw plate with torque value of about 45 inch-lb.