DNB D200II’s Rockbreaker The DNB D200II’s rockbreaker was manufactured to suit machines weighing between 45-80 tonne. A popular and versatile model the DNB D200II’s is bursting with the power of 10500 joules in order to give it’s user optimum advantage on site. Powerful, reliable and extremely efficient the D200II’s rockbreaker makes light work of the toughest rock.