Underlayment Bit, Drill Bit Diameter 5/32 in, Max. Speed 33,000 RPM, Shank Diameter 1/8 in, Overall Length 2 1/2 in, Bit Application Fiberboard, Underlayment, Primary Material Application Fiber Backerboard, Material Carbide, Tip Style Cutting, Flute Length 1 13/32 in, Cutting Direction Right Hand, Number of Flutes 1, Cutting Depth 1 2/5 in, Tool Brand Rotozip