Professional Kits include everything you need to do the job right, i.e. HSS drill, tap, installation tool, tang removal tool , all in a tool box. Clcoil has a full range of problem solving repair kits, available in single or multiple size format. The Single size kit is from M5 to M14 (Metric Size ) ;1/41/2 (UNC;UNF) ; Fitness Kit is include five sizes (M5;M6,M8;M10;M12 ). Detailed Images Material:high-speed steel Size:M5;M6;M8;M10;M12 Types:Spiral-Fluted Taps;Spark Plug Taps Packing & Delivery Packing On demand; Steel Box;Plastic box Delivery Delivery within two days.