It's DeWalt! What else needs to be said? I have had other similar drills but this is the largest set I have purchased. They seem to be holding up well and holding a good point. My last set lasted over 12 years and I still have a few pieces left. I often use them for drilling steel, stainless steel, aluminum. Sometimes softer materials like plastic. In steel, I'll drill anywhere in sheet metal up to 1 inch thick. With proper use, I can usually drill a few holes in 1 inch thick sheet steel before replacing or resharpening the drill bit. I expect a good racquet to last a few years and it usually breaks or dulls from my personal abuse, not racquet failure. I won't be able to resharpen the pilot head, so I'll continue to use the standard twist drill bit for some work.