Multipurpose Spiral Saw Bit Drill Bit Diameter 1/4 in Max Speed 33 000 RPM Shank Diameter 1/4 in Overall Length 2 1/2 in Bit Application Cement Board Plaster Primary Material Application Cement Board Plaster Material Carbide Tip Style Cutting Flute Length 1 in Cutting Direction Right Hand Number of Flutes 1 Cutting Depth 1 in Tool Brand Rotozip