For particularly dense hardwoods, such as Ipe, we recommend that a slot for the clip to is pre-routed with a 1.5mm slot cutter. This will make installation easier and prevent splitting. Set the router height so that a slot is cut at the point where the Sharkstooth will penetrate. Cut the slot to a depth of approximately 4mm, its base should be 10mm up from the base of the board. Length of slot should be approximately 30-40mm.