Groovers 1, Double column 2, Gas-cooling without pollution 3, CE and ISO9001:2008 ... steel blade*Wood handle*Metal ferrule47-480-80 80mm1, Double column 2, Gas-cooling without pollution 3, CE and ISO9001:2008 ... 4, higher efficiency 5, USD38800/setlens groover # 1800A 1. DC motor 2. Suitable for PC,plastic,glass lenses 3 ...