Max hammer drillHammer drill powerful in drilling and chiselling, equipped with the innovative system SDS-max comfort, it has an impact force that is up to 10 Joules in drilling and increases to 11 Joules in chiselling thanks to Turbopower. This allows to easily drill holes up to 40 mm diameter in concrete or carry out repairs without difficulty. This is possible thanks to Constant Electronic which allows to maintain the constant speed even under strain. The new "SDS-Max Comfort" simplifies the work on site, enabling quick change tool with one hand while the other should hold the hammer. It's enough to back the adjusting nut with one hand, so that the spindle remains automatically in the open position and the user can remove the accessory. Once inserted the new tip, the ring locks automatically and it will be possible to continue the work. The vibrations are reduced at two points: on the impact mass and handle. A cushion of air reduces the pressure between the piston and the impact mass. This cushion counteracts the oscillations and, like a spring, reduces vibration to the point of origin: the impact mass.