This is the ultimate handbuilding tool. It is basically 3 tools in one.
 
You get 3 different angles with which you can bevel your slabs for construction.
Place the tool flat on the table up against your slab and draw it along the slab to cut a perfect angle for construction. You get 30, 60, or 45 degree cuts.
 
The taut wire never snags or causes drag or deformation on your slab.
 
You can quickly and easily tighten or replace the wire too!