Trend PROFESSIONAL Quality Router Cutter - 1/2" shank. Tungsten carbide tipped Finger Jointer that combines an assembly of five slotting cutters to produce a profile that increases the glue line threefold, to give a very strong joint.
The Finger Jointer will fit into any portable or stationary router with a 1/2 inch collet.
Before performing the cut ensure that the timber is machined square.
The cutters must be assembled to match the spindle rotation, and stacked at 90 degrees to one another to minimise the vibration and stress on the tool.