The bosch gbh 3 28 dfr professional rotary hammer with sds plus offers top performance with low vibration it has a 20 higher chiselling performance than any other rotary hammer in its class and low vibration thanks to bosch vibration control the quick change chuck makes for fast changes between drilling with impact in concrete and drilling without impact in wood and metal the l shaped design makes for comfortable working and balanced weight distribution there is also a rotation stop for us