A precision machined holding tool made from C.R. steel with zinc plating for corrosion protection. Accurately machined shaft allows for precision use in any drill chuck or Dremel-type tool. Step-down on shaft allows BSA wheels to be mounted with the "spokes" facing the drill chuck, simplifying work on the inside edge of the tread. WARNING: Choking hazard. Small parts. Not for children under 3 years.