- Ensuring a high-quality finish on all types of wood flooring and decking, 1YMR6 features a single-speed controlled 4-brush motor and a dynamically balanced sanding drum which is covered in a unique drum rubber. Safety features include "no-volt start" to prevent accidental startup and motor overload protection. Completely self-contained, with high-efficiency dust pickup. Breaks down into 3 component parts for easy transport. 1YMR7 contains the same performance and safety features as 1YMR6, with an upgraded multispeed control allowing 4 user-selected speed settings and intelligent run-time management.