5pcs HSS High Speed Steel Cobalt Titanium Step Drill Bit Multiple Hole 50 Sizes

If you encounter any issues during use, please don't hesitate to contact us. 【HSS Titanium Coating】Crafted from high-speed steel (HSS) and enhanced with a titanium coating, our drill bits deliver outstanding durability and retain sharpness, even under challenging conditions. This design eliminates the hassle of switching between multiple bits, allowing you to drill various hole sizes to meet all your DIY needs. 【Precision-Engineered Design】The Automatic Center Punch swiftly and precisely creates positioning indentations on surfaces, ensuring accurate drilling without misalignment. 【Convenient Storage Solution】This step bit set includes a specially designed holder with a size index, ensuring each bit is securely stored. 【Wide Range of Applications】Ideal for drilling holes in plastic, aluminum, wood, iron, and various other types of sheet metal (it is recommended to add coolant when drilling metal plates, and the speed should not be too high). Suitable for home DIY, handymen, and professionals. 【Bonus Sanding Paper】Includes two premium sanding sheets for smoothing burrs after drilling, ensuring a clean finish on every project.