These router bits are manufactured from our exclusive ultra-fine micro-grain carbide and feature a 30 degree Center Cutting Mill End with a 45 degree corner chamfer (for extra strength) up cut design and very importantly Aluminum Titanium Nitride (AlTiN) coating for superior cut quality. Increase the ruggedness of your solid carbide end mill’s number one major wear point by the addition of corner chamfers that enhance the edge strength.