The MAPAL single bladed reamers are based on the proven MAPAL principle. The cutting of the material and the guiding of the tool are done by precise ground blades and guide pads at the geometrical best positions. Special lead geometries and exact adjustment of the diameter and the back taper of the blade are characteristical for the WP system. The perfectly aligned adjustment and clamping system guarantee the optimal free of play seating of the blade and as a result the high tool life.