Manufactured from HSS steel for increased lifetime. Suitable for drilling through holes in wood, plasterboard and metal channel. Manufactured according to DIN 7490 and conforming to the German Employer´s Liability Insurance Association in terms of safety requirements for the building trade. The body of the drill bit is attached to the cylindrical shank by means of a thread, therefore eliminating the risk of breakage and guaranteeing absolute concentricity. The small twist angle and enlarged flutes ensure rapid and clog-free chip removal. Made in Germany.