Fullerton's solid carbide 1565 series AlumaDrill is designed for high speed drilling in various materials. The AlumaDrill's 3 parabolic flutes are designed with thinner OD margins which enhances chip evacuation. Pronounced radial grinds on the notch and flute face, making them self-centering and more aggressive in softer material. Fullerton's primary recommendation for low Silicon aluminum, Brass and Copper. Also works well in plastics, high Silicon aluminum and titanium.