Pittsburg Alleghany Cobalt Screw Machine Length Drills made with heat resistant 5% cobalt and have a straw color finish. They are used primarily in screw machines and portable drills. The 135 Deg split points helps eliminate drill walking. Designed for drilling tough high tensile materials like stainless steel, titanium and inconel. Sizes under 1/16 & No. 52 are not split point. Made in USA