Kõvasulampuur Ø5,5x57x93mm

Drill bits are desigend for hand drilling, also machine drilling of very rigid and tough materials, for example for drilling out the cranked standard drill bits or removers of cranked screws. There is a sandable TK slice in the frontal part of the drill bit, 1/3 of the shank consists of the twist. It is recommended to drill at low rotation speed without of using any lubricant.