The new Rottler HP7A Cylinder Honing Machine employs the latest technology available for today’s Engine Machine Service . With 90 years of experience, dedicated R&D and precision engineering we have produced the new front-runner in cutting edge diamond hone technology. The bright, user friendly, full color 10″ (254mm) Windows Touch Screen Control makes honing faster, easier and more accurate than ever before. Rottler Manufacturing continues a lasting tradition of introducing state of the art machine shop equipment for the engine builder. Quality, service, and technical support is built into every Rottler machine.