Northern Tool + Equipment offers the Northern Industrial 208-Piece Rotary Tool Accessory Set
. With free shipping
, it's the lowest total price we could find for such a rotary accessory set by $14. It includes two twist drills, two sanding shanks, four diamond cutters, three steel cutters, 24 grinding wheels, nine brushes, 76 cutoff wheels, 44 sanding discs, collets, and mandrels, and more.