Abstract: A portable wood sander comprising retractable interim fences to support the tool, while sanding, on the surface of an independent supporting structure, other than the surface of the work piece being sanded, and other straddling fences to stop the abrasive cut of the work piece by the sander when a predetermined angle and depth of cut of the top surface of the work piece has been obtained and the straddling fences contact the surface of the said independent supporting structure. The support, control and stop means or fences may be an integral part of the sander or be attachable to said tool or to a previously manufactured sander and may contain means for the fences to be adjustable vertically, horizontally or on an angle, independently or together, in order to obtain a predetermined angle and depth of cut of a work piece by mechanical means.