A.) A piercing point and three pilots are formed in the cutter body. This enables the cutter to be guided by jigs or the inner frame from the top, middle or bottom of the cutter. A very useful cutter for motor body building, caravans and boat building.
B.) This unique cutter is especially made to cut out body sides using the middle guide to follow the inside frame. The cutter has a piercing and spiral cut of high speed steel for cutting the aluminium outer skin and tungsten carbide tipped top cutter for the interior plywood.

Staggered tooth straight router bits for fast cutting, due to single tooth action, but balanced with opposite tooth. Will drill own starting hole.