DRILLCO DRL300A115 - 15/64Stuby Drill Heavy DutyBrand Drillco Product SKU 300A115 Category Drills Size Fractional Material High Speed Steel Finish Coating Black Oxide Pack Quantity 12 Size 15 64 Overall Length 2. 7 16 Flute Length 1. 5 16 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