Marcrist ddm1 core drill machine for drilling holes in wood plastic concrete bricks and stone has two speed settings that are controlled with the flip of a switch reduced vibration for protection against white fingers to allow a longer drilling time specification chuck size 1316mm input power 1200 watt no load speed 0 15550 3000min core capacity 152mm weight 38kg sound pressure level lp a 91 dba kp a 3 dbsound power level lw a 102 dba kp a 3 db vibation emmission values concrete ah id 875 ms2 k