1.Place in rings or one-piece mount. Tighten rings to remove slack, leave loose enough that the can still be rotated by hand. 2.Place the leveler base on the Picatinny rail or one-piece mount directly the turret of the . The angled slot should be on the top side. 3.Insert the leveler wedge into the slot on the base from the side until it contacts the bottom of the turret . 4.Gently apply pressure to until the rotates and is leveled. 5.Tighten one ring according to the specifications provided by the ring/mount manufacturer. Remove the optic leveler. Tighten the other ring according to the specifications provided by the ring/mount manufacturer. Use of the Arisaka Optic Leveler makes the assumption that the 's turret and reticle are aligned, which may not be the case with poor quality scopes. features:correction training:grasping, other training, toys, interest training Colour:As Shown Material:CNC Aluminum Package Contents: 1Set * Telescope Vertical Corrector Tool Set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.