Specially designed taps used together with either Blue Powerbot 1/4" HEX shank drills or Blue Powerbor cutters for drilling core diameters. The Powerbor Combi Drill/Tap kit eliminates the need for tapping attachments. The M6 - M10 combi range of drills and taps are used with a unique adaptor having a standard 3/4" dia 2 flat shank with a 1/4" HEX bit drive. Fitted in seconds it means threads can be drilled and tapped easily when required. With the M12 - M24 range Blue Powerbor cutters are used for core drilling.