These hex drill bits are made with a titanium coating for added durability and a longer tool life. They have a ¼ inch or 6mm shank and are compatible with most power drills. The higher quality finish reduces friction and heat, resulting in a longer lifespan for the tools. The set includes a variety of sizes ranging from 1.5mm to 6.5mm, giving you the flexibility to tackle a range of drilling projects. The bits come supplied in a handy storage holder, making it easy to keep them organized and within reach when you need them. Whether you're a professional contractor or a DIY enthusiast, these drill bits are a valuable addition to your toolkit.