The AIYI HSS Step Drill Bit (4-20mm) is a versatile and efficient drilling solution designed for enlarging holes and covering a wider range of sizes with a single tool. Made from high-speed steel (HSS), this drill bit delivers excellent durability, heat resistance, and long service life.
Its step design allows smooth and accurate drilling across multiple sizes without the need to change drill bits. Each step is clearly marked for quick size identification, ensuring precision and ease of use.
Ideal for thin materials such as steel sheets, aluminium, plastic, and other metals, this step drill bit is perfect for DIY projects, electrical installations, automotive work, and general workshop applications. The wider 4-20mm range makes it especially useful for jobs requiring larger hole sizes.
Features
Multi-Size Drilling: Covers sizes from 4mm to 20mm
Step Design: One bit for multiple hole sizes
High Speed Steel (HSS): Strong, durable, and heat-resistant
Clear Size Markings: Easy and accurate drilling
Smooth Cutting Performance: Reduces burrs and improves finish
Wide Application: Suitable for metal, plastic, and sheet materials
Extended Range: Ideal for larger hole requirements
