Ray Foster MR20 Model Arch Trimmer, Single Unit. Large, stainless steel work surface with venting for dust removal. 1-1/2" (38mm) hose connection, connects directly to 1-1/2" vacuum hose, no need for adaptors. Power output connection. Safety switch disconnects power when top is removed. Includes fast cutting, non-clogging, SaburTooth carbide burs, one cylinder and one taper. Diameter 9" at base. Overall height with safety shield: 13". 115 volt, 60 Hz standard.