ATR41 tapered aircraft routers have a 118 degree point to allow drilling from solid prior to routing. The 3-flute design is ideal for trimming and routing aircraft materials. Manufactured from premium High Speed Steel, the tools can be used for drilling many materials including aluminum, steels and stainless steel, whilst the bright finish ensures clean and accurate results by preventing workpiece material from sticking to the cutting surfaces of the tool. ATR41 aircraft routers are designed for use on CNC machines.