This Is A High-speed Cutter With A 1/8" Steel Shank Ideal For Cutting Wood, Plastic, Fiberglass, Drywall, Laminate, Aluminum And Vinyl Siding. This Cutter Is Ideal For Multi-purpose Cutting.* 1/8" Bit, 1/8" Shank * Cuts Many Differrent Materials * High Speed Cutter * For Use With Dremel Tool * Outstanding Quality