The tc rh 900 rotary hammer with pneumatic hammer action is a versatile powerhouse which provides good service to ambitious diy enthusiasts on building renovation and chiseling jobs everywhere in the home it is equipped with three functions for universal use hammer drilling drilling and chiseling the sds plus chuck enables drill bits and chisels to be changed without tools and together with the powerful 900 w motor it develops an hammer force of 3 joules thanks to its robust aluminium gea