IRWIN 10221 Flat-Bottom HSS Step Drill Bit

The IRWIN Step Drill Bit 10221 is used for drilling stepped holes in thin materials like sheet metal, plastic, and wood. Its flat-bottom design creates clean, burr-free holes for applications such as electrical enclosures, automotive panels, and HVAC ductwork. The black oxide coating reduces friction and extends bit life.

The IRWIN Step Drill Bit 10221 has a size range from 13/16" to 1-3/8", is made of high-speed steel with a black oxide finish, and features a 3-flats shank to prevent slipping in the chuck. It is not impact rated. The manufacturer part number is 10221.

You can source the IRWIN Step Drill Bit 10221 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine IRWIN products to procurement teams and engineers globally.

To select the right IRWIN step drill bit, match the hole diameter range to your application. The 10221 covers 13/16" to 1-3/8" in stepped increments. For thinner materials, use a slower speed and light pressure. Always ensure the shank fits your drill chuck; the 3-flats design provides secure grip without slipping.