1/4" Hex Shank: Quick change 1/4" (6.35mm) hex shank, which can be easily fit into power driver, drill and press drill.
Material: The step drill bits are made of high quality high speed steel which with titanium coating, durable, anti-corrosion, sharp enough to drill through wood, plastic, sheet metal.
Two-Flute Design: Two-flute design makes it easier for cutting, provides smoother, accurate, faster cutting, it's really good tools for us.
After-sale Service: If our cone drill bits don't meet your expectations, just feel free to let we know and we will provide you with free replacement service.