DRILLCO DRL300C132 - 1/2Cobalt Stuby Drills Heavy DutyBrand Drillco Product SKU 300C132 Category Drills Size Fractional Material Cobalt Finish Coating Bronze Pack Quantity 6 Size 1 2 Overall Length 3. 3 4 Flute Length 2. 1 4 Description Screw Machine Drills are designed for use in machines and portable drilling in hard sheet metal alloys such as stainless and titanium. Because of their heavy duty construction and ease of penetration stemming from the split point with which they are normally furnished