for Hire in Botany and Sydney. The CONCRETE PLANER - 200MM WITH FLOATATION is one of the most innovative concrete planers on the market. The Mastiff scarifier features the CutterSafe technology keeping the production rate at its maximum without damaging the shafts at cutters. Powered by a powerful 9hp motor with high quality belts means you get the maximum power transmitted to the surface for added production. The fast raise and lower mechanism means you can stop scarifying & raise the drum off the concrete floor and then return to the same depth as before in a flash without adjusting the depth setting.