Using the DeWalt DW1369 drill bit set is easy. First, select the right bit size for your project. Make sure your drill is turned off before inserting the bit into the drill chuck. Tighten the chuck securely to prevent the bit from slipping. When drilling, apply steady pressure and let the bit do the work. Don't force it too hard, or it may break. This set is great for non - ferrous metals, wood, and plastic. For wood, you'll get cleaner holes with less splintering. When you're done using the drill bits, wipe them clean with a dry cloth. Store them in a dry place to prevent rust. If you notice the bits getting dull, it might be time to replace them. With proper use and care, these drill bits will serve you well for a long time.