Mount the Mini Wheel and Mandrel on the right side of the Foredom. The Wheel and Mandrel need to run counter clockwise. The wheel works best if you run it at least 3450rpm. MINI WHEEL 2" Diameter Unitized Wheel 1/4" thick with a 3/8" arbor hole. Made of non-woven fiber coated in aluminum oxide. Recommended for use with Foredom's Bench L