These are what I bought, in 2014, I believe after watching one of AvE's vidjayos. I don't drill often, but when I do need to, these haven't let me down. Wood, aluminum, steel, drwyall, etc. The ones that I bought are an earlier version, with a solid case, but aside from that, I think they're identical. If there were any complaints to be mentioned, it might be that they're a bit aggressive. Aside from that, the case that mine came in is exceedingly difficult to open and close, but at least they'll never fall out accidentally.