General description The 13 HSS twist drill bits set features a range of sizes from 1.5mm to 6.5mm, designed for drilling wood, plastic, and thin metals such as aluminum and iron. This set is not suitable for masonry or stainless steel. Technical specifications Number of pieces: 13 Diameter range: 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.2mm, 3.5mm, 4.0mm, 4.5mm, 4.8mm, 5.0mm, 5.5mm, 6.0mm, 6.5mm Hex shank size: 6.35mm Material: Titanium-coated high-speed steel Compatibility and accessories Compatible with bench drills, handheld electric drills, and standard drill chucks. Usage Designed for even drilling with a 45° outer edge angle to enhance performance. Threaded chip flutes for efficient removal of chips and debris.