DNB D110II’s Rockbreaker Our most popular and versatile model the DNB D110II’s rockbreaker was manufactured to suit machines weighing between 25-40 tonne. The DNB D110II’s is bursting with the power of 5800 joules in order to give it’s user optimum advantage on site. Powerful, reliable and extremely efficient the D110II’s rockbreaker makes light work of the toughest rock.