The MATCHFIT Dovetail Router Bit makes the MATCHFIT system quicker and easier to use. It is designed especially for the MATCHFIT Dovetail Clamps and dovetail hardware. Its original design rounds over the sharp top shoulders creating incredibly clean dovetail grooves and virtually eliminating the need for sanding atomically. When cutting grooves it clears wood chips and dust creating less friction and heat resulting in cleaner cuts with its 14°, 1/2" profile with rounded corners also allows for smoother grooves. This bit has a router collet safety line that shows you how deep into the collet the bits should be before using.