universally sizing and straight shank compatibility streamlines tool changes across drill presses , hand drills , or machines , ensuring seamless workflow in multimaterial applications Perfect for professional metalworkers , automotive technicians , and enthusiasts requiring reliability tools for heavy duty metal fabrication or home improvement projects Tackle demanding tasks in workshops , construction sites , or garage repairs , drilling through thick iron plates , alloy pipes , or stainless steel fixtures with consistent precise Engineered with coated surfaces , these 5PCS twist drills deliver 40 % enhanced durability and superior wear resistance , ideal for steel , metal , and aluminum alloy drilling The precise spirals flute design ensures rapid chip removal and reduced friction , while coating minimizes overheating during high speed drilling up to 1200RPM, Manufacturer: PURPLELILY