Four C-4 carbide tips on each chipper help make this the industry leader. Highest quality for the cleanest cuts possible. 8'' Deluxe Dado King Blade- Each chipper has 4 teeth, cutter has 24 teeth and has a 5/8'' arbor. Cuts all sized grooves - 1/4" through 29/32" increments.
Though a bit pricy, a dado set pays for itself because it makes cutting grooves on your table saw very fast, easy and accurate. You may run across a steel dado set- that is, one that has steel teeth instead of carbide. These are less expensive but beware. It's expensive to get a steel dado set sharpened, and any steel blade will need to be sharpened far more frequently than a carbide tooth set, particularly if you cut through glue as when cutting plywood. For a small shop, the less expensive carbide dado sets are the best bet. You may not ever need to get it sharpened. Get a more expensive set if you plan to do a lot of work with the tool and need the longevity a better tool provides. If you plan to cut many dadoes in veneered plywood or laminates, get a set with a maximum of teeth for a smoother cut and less chipout on the edges.
The small, 6 inch diameter sets are the most economical and fine for most work. They can't be raised as high above the table as 8 or 10 inch dado sets, but rarely do you need to do that with a dado.
Most dado sets shown above will cut a groove from 1/4" to 13/16" wide, in 1/16" increments. This is standard with most dado sets so you can cut a shelf groove for 3/4" plywood (or less) to fit in. As well they are all for standard 5/8" arbors such as most table saws and radial arm saws have.
To fine tune the width of cut you set up for with your set, place shims between the stacking components. Make shims out of paper or sandpaper, or buy a set such as that shown above. Many dado sets come with a shim set.