Now you can drill into wood using your hammer drill without having to change the drill chuck or machine use for exact splitter free drilling in veneered wood as well as in natural hard and soft wood the spirals have been especially shaped with threaded top and roughing tap centrical drilling comes with sds plus attachment shaft do not forget to turn the impact off 6 piece set 6 8 10 12 16 20 x 230 mm in practical wooden box