With the Milwaukee hss-r din 338 metal drill bit set, you can drill accurately through steel, cast iron, and alloyed or non-alloyed metals up to 800 N/mm². The roll-forged hss-r construction delivers superior elasticity and high resistance to snapping, making it well suited for drilling pilot holes and rivet holes in sheet metal. An oxide coating and type n flute geometry ensure fast swarf clearance while reducing heat buildup and friction. Featuring a 3 mm straight cylindrical shank for standard chucks, this convenient 10-piece pack keeps you fully supplied for fabrication and maintenance jobs.