Which utility knife do you prefer? I looked at several before narrowing it down to a couple. The Screwpop seems popular, its small and cheap as well. Some reviews claims, that the Screwpop is noisy and that it rattles. This wouldnt bother me even if true, as long as the blade is held securely. I mean, what does people expect from these small pocket tools. After looking at the Screwpop, I happened to come across the Quark. Very nice little utility blade holder. Good quality and its both practical in use and holds the blade securely in all three positions. The nice things about these tools; minimalist, blades can be had most everywhere. Excellent for those who travel. In regards to those keeping one of these on a keyring; its nice that you can just dump the blade (for example in the airport, if you forgot about having the tool on the keyring) and buy a new blade at your destination thus having a non threathening blade for mundane tasks on your travels. When I first visited the Quark site, I was offered a discount. With the tool being of a nice quality and not expensive to begin with, the choice was easy. There are a plethora of small(-ish) pocket tools on the market. Some makes more sense than others. The Rexford RUT for example didnt appeal to me. Too big and silly expensive (Im not about to pay $130+ for a small utility blade holder) Why they stuck a cap lifter on the end seems to defeat the purpose of a minimalist pocket tool IMO. On the bay, there was a very inexpensive clone of the RUT but that was of course out of the question. The Quark is excellent and I use it almost daily.