The Quadraset™ is an adjustable slotting assembly that includes 1/8," 5/32," 3/16," & 1/4" two-wing cutters, a 1/2" shank arbor with a pilot bearing, and a handful of spacers, washers and shims.
Conceptually it is like a table-saw dado stack set. You can use the cutters individually on the arbor, or you can combine two, three or all of the cutters on the arbor. Thus you can cut slots that range in widths from 1/8" up to 23/32" in 1/32" increments.
For different depth of cut, see Vari-Depth™ bearings. A full 3/4" cut can be achieved using one additional #53107 cutter (available separately).
Use in a table-mounted router. Not for use in a handheld router!