Introducing the most effective tool available for proper precision scope mounting. The WheelerA(R) Professional Reticle Leveling System features a clamp-on front level that features a factory-calibrated integrated level and won't move when bumped like cheaper systems. The rear level attaches magnetically to a scope base, bottom half of a ring, and/or scope turret. The System comes in a nice molded protective case. Front level clamps onto your barrel Rear level attaches magnetically to a scope base, ring, etc. Both levels feature a CNC-machined aluminum body Factory-calibrated reference level