? High-Quality Step Drill Set This HSS Step Drill Bit Set comes in three versatile sizes: 3-12mm, 4-12mm, and 4-20mm, ideal for drilling through various materials. The titanium-coated surface ensures extra durability, while the straight groove design provides cleaner, more precise holes. Perfect for use with metal, plastics, and other tough materials, this set is a must-have for DIYers, professionals, and anyone looking to achieve perfectly drilled holes with ease. ?? Key Features: Multiple Sizes: Includes 3 sizes for a range of drilling tasks Titanium Coated: Longer life and improved cutting precision Straight Groove Design: Ensures smooth and clean drilling Versatile: Ideal for metal, wood, and plastic Easy to Use: Designed for both beginners and pros Perfect for your workshop or toolbox, this drill bit set guarantees superior performance and accuracy with every use.