Cyclone HSS Premium Grade Annular Cutter, 3 4 in dia x 2 in Depth, 3 4 in Weldon Shank, Includes Pilot Pin no checkout Cures when confined in the Cures when confined in the absence of air between close fitting metal surfaces Designed for use on flanged mating surfaces Forms a flexible galling rust and corrosion Will adhere to wet or oily surfaces Can be applied directly to hot surfaces without running off Evolution standard geometry is sufficient for most drilling applications Manufactured specifically to maximize hole accuracy while minimizing cutter vibration and extending annular cutter life Using this standard geometry enhances accuracy and saves time This allows for a single ejection of slugs when drilling through stacked material