ZFE 22mm Mounted Cotton Polishing Buff Wheel 3/32"(2.35mm) Shank For Dremel Rotay Tools Pack of 20pcs Set of Mounted Cotton Buffs, Polishing Tool, Fit Rotay Tools Grinder The diameter of the shank is 2.35mm Mounted Cotton Buffs Polishing Wheel for Dremel Rotay Tools The polishing wheels are belong to the consumables These are great for polishing jewelry or other metal working uses.they can be used with a dremel tool,fit for rotay tools grinder