Using the DeWalt DWAH1107 drill bits is easy. First, choose the right size bit for your job from the set. Insert the 1/4' Hex Shank into your drill or impact driver. Make sure it fits snugly. When drilling, start at a slow speed to get the bit in place, then increase the speed. This set is great for drilling through metal, wood, and PVC. Just be careful not to put too much pressure on the bit, as it might break. Also, if you're drilling metal, it's a good idea to use some lubricant to keep the bit cool and extend its life. After using the drill bits, clean them with a dry cloth to remove any debris. Store them in a dry place to prevent rust, even though the black and gold finish helps with that. If you notice any signs of wear or damage, it's time to replace the bit. That's all there is to it! Enjoy your drilling projects with these reliable DeWalt drill bits.