 Hi, this is Alex and today we've got gutting of a Mark's high-security cylinder. Here's a shot of the keyway. It's actually pretty permissive as they go. Shot of the key and the key card. This is a six-pin tumbler lock. Bitting is not too wacky. But it has additionally a five finger pins on the side that run a side bar. And here's some close-ups of the groove and some different ways of making it a little easier to see. So we'll get some close-ups of how that works in a minute. Here are the pins. You can see they're all spools with very narrow bases. A little bit closer. Key pins are all regular. And there's a close-up of the spools and how narrow those little things are. We'll see that. Here are the finger pins. That's the bottom of the plug. And this is what they look like on their own. Here's a close-up. The second from the left is that high-set one. You can see the difference in the notch. And there's a close-up of it. So it has a false gate. Here's the sidebar groove. You've probably seen one of those before. Here's another shot of the finger pins with the sidebar in there. So you can see the orientation. A little better view of where the finger pins sit. This is what the sidebar groove looks like in the neutral position. The sliders are actually unsprung, so they kind of float around in there. You can see the false gate actually pushes the sidebar back out, which is a bit of a pain. Here's what it looks like with the key inserted and all of the sliders aligned properly. A little bit closer. You can see that the sidebar can easily slide into that slot. The chambers in the plug are counter-milled. It's a pretty good shot of that and a little bit closer. So those spools like to really get stuck in there. The inside of the chambers in the shell is vaguely serrated as well. It may just be milling marks, but you do get some feel of serration. So I've not been able to pick the sidebar yet. I get into some nice falses, but it's really hard to get feedback from the sidebar. I got this on eBay. If you can get yourself one, they're pretty fun to play with and probably good preparation for trying to pick some of the other sidebar locks. Anyway, thanks for watching. This is Alex and as always, have fun and please keep it legal. Cheers!