The Makita 9553NBR Factory Reconditioned 4-Inch Angle Grinder. This 4-Inch angle grinder has an exclusive labyrinth construction that seals the motor and bearings from contamination. The 9553NB features a switch that is conveniently located on the side of the motor housing; a small circumference barrel grip for easy handling, a high power-to-weight ratio and a double insulated motor. A spindle lock makes for easy wheel changes and the side handle can be installed on either side of tool.