The hss drill bit/step drill bit size: 0.5 mm | M3, 0.7 mm | M4 step drill<br> The Drill bit set size : 0.8 mm | M5, 1.0 mm | M6<br> The hss bits size : 1.25 mm | M8, 1.5 mm | M10<br> The drill bits for steel heavy duty/step bits for metal /step drill for stainless size:1 *5 inch center punch with rubber cap<br> The drilling package: 6 pcs drill bits, 1 center punch for metal<br> The drill/hss drill bit/step drill bit/step drill/step bits for metal/step drill for stainless package:<br> 6Pcs Drill Bit +1Pcs 5 Inch HSS center punch (center punch for metal)<br> Die drill - Application range: automotive sheet metal, repair and conversion, bridge doors and windows, household appliances.<br> The drills can be used for the following Devices: hand drill, drill, milling machine, machining center.<br> The drills from specialty:<br> The titanium alloy coating reduces friction and is more durable than uncoated drills. HSS (high speed steel) has a longer service life.<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store