Cyclone HSS Premium Grade Annular Cutter, 3 4 in dia x 2 in Depth, 3 4 in Weldon Shank, Includes Pilot Pin no checkout 5 ply Kevlar® sewn Split cowhide welding 5 ply Kevlar® sewn Split cowhide welding glove with Gunn Wing thumb and full sock lining Heat and abrasion resistant Cures when confined in the absence of air between close fitting metal surfaces Designed for use on flanged mating surfaces Forms a flexible 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