The Starrett A4 Arbour with 6.35mm (1/4") high speed steel pilot drill and 6.5mm (1/4") hex shank, fits hole saw diameters 14-30mm (9/16" - 1.3/16"). A set screw in the body allows for easy replacement of the pilot drill. Screw thread 1/2" - 20.
Applications
Fits hole saws from 14-30mm (9/16-1.3/16") diameter Arbour suitable for use with Fast Cut (FCH) and Carbide Tipped (CT) hole saws Imperial Sizes 9/16" to 13/16" Metric Sizes 14mm to 30mm