Watch Video: https://www.youtube.com/watch?v=QvHT0X-DWj8 The GuideMatic concept was developed to address the problem of controlling the cutting action of small, portable, high speed rotary (Dremel type) power tools. With this attachment, one can accurately freehand plane straight lines while controlling the amount of material being removed without gouging. The supplied solid carbide cutter will cut any wood, wood composite, plastics, laminates and Corian. The GuideMatic is the perfect accessory for your hand-held rotary tool. With the Straight-Line Guide you can now make controlled straight cuts up to ½ inch wide x 1/64 inch deep per pass in wood, wood composites, plastics. The cutter can also be extended beyond the end of the guide to produce grooves. Also included in the kit is the Profiling Guide that allows the user to use the tool like a power knife. With it you can gouge out openings, enlarge holes, follow curves. The unique geometry of the Profiling Guide allows the cutting depth to be varied from 0 to 1/32" deep simply by rotating the power tool relative to the workpiece. The GuideMatic produces shavings instead of fine dust and directs debris downward and away from the operator. The cutter is well shielded and difficult to damage or break. 

The GuideMatic allows you to perform operations that were previously impossible to do freehand. 
Do not compare its operation with sanding discs. 
There is no available tool that can do what the GuideMatic does!