Overview 20 x 25mm HSS-M2Al Annular Cutter Annular Cutters achieve burr-free finished holes without the need for pre-drilling or step drilling. Faster and more accurate than using standard HSS twist drills. Bordo Annular Cutters are CNC ground and feature multi-cut geometry for smooth and fast cutting. The precision ground flutes run the entire length of the cutter providing efficient chip removal. Increased cutting speed. Reduced tooth load. Minimized tool wear. Extended tool life. Close tolerance drilling without runout. Reamed quality, burr free finished holes. Resharpenable. Bordo Annular Cutters feature a 3/4" universal shank that suits most standard machines including Hougen, Slugger, Rotabroach, Rotabest and Nitto.