The KonusWheel was designed and manufactured by a Benchrest Specialist for benchrest shooters. Machined 100 percent with magnesium, it is lighter and stronger than standard aluminum wheels. Custom made in Italy to fit the Konus M30’s and F30’s like a glove. Furthermore, the internal construction was designed to be scratch resistant to protect the riflescope when attached. The use of Torx screws provides an extremely reliable, non-slip connection for many years. Diameter: 130mm/5.1"