Bicycle Mechanics - what do you think about this lock?

http://www.amazon.com/Lock-Motorcycles-Bikes-Heavy-Duty/dp/B0025ZDUS2#productPromotions

The keys aren't those cylindrical types, so people can't really hack into it without specific tools.

No clue,,
its another D lock, China based company no doubt.

certainly sells for cheap.
tell me something about the heat treatment processes the parts received
and that will go a long way to describing the strength.

buy several test what tools and techniques are required to defeat them.
Bike Radar , part of the group that runs the cycling news site,
destruction tests locks and reports on what they had to do..
places odds on whether a culprit would carry those tools.

I was reading a thread about this lock in another section. Apparently someone figured out how to open it with a bic pen. I think it was the same lock anyway.

It's obviously cheap and probably not too strong, but if it intimidates a thief with bolt cutters into looking for another bike I guess it's done its job.

this one (http://www.bikeforums.net/showthread.php/733456-opening-U-locks-with-a-bic-pen?highlight=)? yea I made that thread, as you can see. Like I said, the keys for this one is different. they're not cylindrical. The old U-locks could be opened with bic pen cutouts because the cylindrical shape of the pen match almost exactly with the keys. This u-lock uses keys that have teeth in them.

and just for the record, I got to keep that outdated u-lock after getting my refund, and based on the picture, the make of the u-lock from this thread and the other one appear to be the same.

In any case, I would assume that it's much better than an ordinary bike lock that you can buy from walmart, right? I mean you need a small disk saw to hack through the metal... you can't just open it with a bolt cutter can you?

Yes, you can. The thinner it is, the easier. That's pretty thin, and there's different types of heat-treating.

The two most common ways through a U lock are bolt cutters (thicker is better here, along with a quality heat-treatment) and bottle jack (design of shackle is what helps.) I'd venture a guess that the shackle is a simple and easily defeated design, and it'd be pretty easy to snip through that with bolt cutters.

It weighs 1/4th what my u-lock does, that says something at least.

damn!

well I think I'll take my chances with this one anyway. I mean the price curve is pretty wacky. You have to go up to $60 or so in order to have a lock that weighs ~4 lbs. Everything in the $10-30 range weighs no more than 2.4 lbs. I don't know about heat treatment though

if you got the bike at wall mart what's to lose..?

it looks like a lock and the bike is marginal so people likely won't bother,

what makes you assume I got my bike from walmart?