A butterfly key spline bit allows you to make strong loose tennon joints that are either hidden or can be used decoratively - such as butt joints on end-grain, as tray legs or even a simple chopstick stand. It can also be used for drawer and table extension slides.
Run your own moulding using this bit and if necessary, cut a slot using a dovetail bit with a 14° angle. To run the moulding, setup the centre point of the bit in the centre of the timber and make two passes on either side then machine as neccesary for use in a variety of projects.
For better safety, these bits should be used only in a router table equipped with a fence and not used free hand. Only available in a 1/2in shank to suit material 12 – 45mm high.