Handy tool to assist getting the O-Rings on the rear bearings of the CRC MetriCKs line of cars (1/12, F-Won, M200-R). Also works on other brand that use o-ring on rear bearing with .375 outer diameter bearing, like Awesomatix A12.
Simply put tool thru bearing, Screw on nut to hold tool in place. Roll O-Ring onto bearing.
