1、Multiple Sizes: This step drill bit set includes step drill bits ranging from 4‑32mm, 4‑20mm, and 4‑12mm. With these different sizes, you can easily create various hole diameters without the need for multiple drill bits, saving you time and effort. 2、Easy To Use: With their step design, this hex shank step drill bit allow for sleek and accurate drilling. The clearly marked sizes on the bits make it easy to select the right one for your needs. 3、Good Compatibility: The electric step drill bit is compatible with both hand drills and bench drills, giving you flexibility in your drilling tasks. Whether you are working on a small DIY project or a larger professional job, these bits can handle it all. 4、Wide Application: This titanium plated step drill bit has a wide range of applications and can be used for materials such as wood panels, aluminum alloy and copper. 5、Excellent Titanium Plated Material: Made with a titanium coating, this step drill bit is resistant to wear and tear, ensuring long lasting performance. The coating also reduces heat buildup, extending the lifespan of the bits and providing consistent results.