Sightron Magnetic Side Focus Wheel 145 mm Red. The magnetic connection allows the wheel to attach or detach in less than 1 second without tools. Great for transporting your gun and when you need to make a quick adjustments to your rifle on the line. Specifications for Sightron Magnetic Side Focus Wheel: Manufacturer: Sightron Diameter: 145 mm Features of Sightron Magnetic Side Focus Wheel Custom Garima magnetic focus wheel made in Italy 145 mm diameter weighing only 82 grams Detaches in less than a second 3 spoke design with external and internal grips Package Contents: Sightron Magnetic Side Focus Wheel Installation guide (2) Required allen wrenchs Sightron 71003: Magnetic Side Focus Wheel 145 mm Red