. HSS TAPPING DRILLS M3 - M10 TAPPING DRILLS 6 Pcs.BLACK-33013FOR METAL, LUMBER, MIXED METALS, PLASTICS, etc.6 DRILLS IN SIZES 3-10MMKIT OF DRILLS READY FOR THE MOST DIFFICULT TASKSDrills made of HSS. A set of tapping drills is an indispensable piece of equipment for every home DIYer's garage and professional repair shops. It will be perfect for drilling holes in materials such as:soft metalsaluminumconstruction steelplasticswooditp. Tools for drilling holes in materials such as:soft metalsaluminumconstruction steelplasticswooditp. Bit-type hex shank, 1/4 ' (6.35mm) for screwdriversRecommended to work at slow speed and use coolant during operation SET INCLUDES:M3 x 0.5mm - 2.5mmM4 x 0.7mm - 3.3mmM5 x 0.8mm - 4.2mmM6 x 1.0mm - 5.0mmM8 x 1.25mm - 6.8mmM10 x 1.5mm - 8.5mm.