Komet precision tools india manufactures kub duplon drills specifically equipped for small bores, high cutting speeds and feed rates. It includes feature of shape of the still drill body, with a solid carbide head. This is attached to the tool body using a special connection process. This drill has range of diameter from 8 mm to 16 mm [0.315" to 0.630"]. These are efficient in drill depth of 3x and 5x the length to diameter ratios.