Hmt Versadrive Hss-Cobalt Drill Bit 4.2Mm (M5 Tap Size) 209010-0042
Simply the best long-life twist drill bits for Metal All VersaDrive™ Drill Bits can be used in any standard 1/2" drill chuck for cordless or pistol drill use, or adapted for use in a Magnet Drill or Impact Wrench.