A butterfly key spline bit allows you to make strong loose tennon joints that are either hidden or can be used decoratively. Run your own moulding using this bit and then cut out the slot using a dovetail bit with a 14° angle.
To run the moulding, simply setup the centre point of the bit in the centre of the timber and make two passes on either side. It can also be used for drawer and table extension slides.
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.
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