I took mine to AK this year and it was excellent. I agree with everyone else in the foam inserts being garbage, but it’ll hold a pile of stuff once you toss those.
The holes for locks are 1/4” diameter and 7/8” shackle length. Longer shackle lengths will allow enough room to open the case once the clasps are opened up. You can’t pry it open with these.
My brother has one and I compared it to my Pelican case and its the exact same case except for a couple of very small things. Basically cosmetic design items. For the money I don't see how you can beat it. I ended up getting one.
Now that Colorado passed a law that requires all guns to be in a locked case in the vehicle (I assume that means "unattended" vehicles), I'll need to have mine locked up so that the thieves can more easily just grab the rifle case of two, instead of individual rifles. Heck of a law, this is akin to the CO "puffing" law........punish the every day citizens while allowing the criminals to do whatever the heck they want.