I got ripped off again last weekend, making it twice now in two years. My trimmer rack is too strong to break, but the locks arent. Two years ago I had a cheap $9 lock that took the thief probably five seconds to snap with a crow bar. I figured it was partly my fault for making it so easy for him, so I went out and bought the biggest hunkin Master lock I could find for $25. I have relied on this lock for two years, but now I realize that it has been a big mistake. It was plain to see where the bolt cutters bit into the shackle, but the shackle didnt get cut through! --- it CRACKED right in half, and my trimmers went bye bye. The rest of my stuff is locked up with these really cheap, made in China, round disc locks like you see at storage lockers and such. The shackle is only exposed for about ¾ of an inch, so when they are deployed, there is no way to get a bolt cutter on them. I have decided to switch everything I lock over to these locks. Even the chain I use to lock my trailer down with is going to get a 3/8 inch piece of flat bar welded to the end so I can use the disc lock on it too. I called the manufacturer of the locks and they said it was extremely hard for anyone to cut through them with a bolt cutter because of the stainless steel shroud around the shackle. Im through with those flimsy and expensive Master locks!