The Spuhr Optic Leveling Kit is an inexpensive, easy-to-use tool for indexing the reticle to the Picatinny rail just below the turret cluster of the scope. The matching wedge is inserted from the side and as the ramped surfaces of the wedge and base engage, the top of the wedge rises upwards and contacts the turret cluster, automatically leveling the reticle to the mount.