Astro 7581 Automotive Drill & Tap Set – MetricNo nonsense set covers 90%+ of Metric automotive fasteners M12 and under, with taps that can be driven by included ratchet that quickly switches from forward to reverse using patented handle selector or by standard 3 4 (19mm) sockets or wrenches Includes custom HSS drill bits indexed with their matching tap size for easy reference and featuring shorter length, 3 flats and reduced shank on sizes above 3 8 for a secure fit and improved access with