5985312 17/32 Diameter Carbide Tipped Counterbore, Made in the USA 3 flutes 4 5/16 overall length 3/16 pilot hole diameter Morse Taper Shank #1 For non-ferrous & cast iron and non ferrous material Model 5985312 Brand Name Super Tool Shank Type Morse Taper Unit Count 1.0 Count Item Weight 4.32 ounces Part Number 5985312 Manufacturer Super Tool, Inc. Material Type Carbide Item Dimensions 4.31 x 0.53 x 0.53 inches Tool Flute Type Parabolic Minimum Bore Diameter 17 Inches Surface Recommendation Cast Iron