- Three style options to suit your project: metric and SAE sizes with finishes including metric blue plating and standard SAE finish. Pick the set you need. - Material and treatment: made of high speed steel for fast cutting and durable performance. The drill/tap is treated with an alloy-based coating to greatly improve cutting efficiency. - Size range: Metric sizes are M3X0.5, M4X0.7, M5X0.8, M6X1, M8X1.25, M10X1.5; SAE sizes are 1/4-20NC, 12-24NC, 10-24NC, 10-32NC, 8-32NC, 6-32NC. - Clear labeling: each tap is engraved with its size for easy and quick size selection. - Practical use scenarios: - Threading holes in aluminum or steel components for machines, enclosures, or chassis. - Repairing stripped threads in automotive panels or metal furniture hardware. - Hobby machining, DIY projects, or electronics enclosures where reliable threads are required.