I finally finished drilling out my large Xena lock that the key broke off in a couple of years ago. The company I bought it from was supposed to send me a new "bullet" for it. I think I paid $9 to cover shipping. When I didn't get it and wrote them an email about it, they sent me a whole new lock, but smaller. It uses the same bullet as the big lock. You can put 2 stacks of button batteries in it, 6 altogether, IIRC, possibly 8. That's for the built-in alarm with a motion sensor inside the bullet. By manipulating the key when you lock it, you can have the alarm turned on or off while it's locked. After I drilled out the old bullet enough to get it out of the lock, I still had work to do. The hasp had a clear (at one time) plastic tube over it that ran from the top of the lock body, up and across, and back down to the lock body. It was cracked and split in several places so I cut it off. Then I spent an hour sanding the rust off with 80 grit sandpaper, and a fine grit sanding sponge to polish it up a bit. I squirted WD-40 in and on the lock and wiped t down with paper towel, then cleaned the bottom of the hasp holes with shotgun cleaning patches. Then I put the bullet from the small lock in it.
Now I need to buy another bullet if I can so I'll have 3 Xena locks in working order. I have my ATV chained up with a different kind. The hasp is about the same thickness, width, and opening as the big lock, and the body is about the same width and thickness, but it's not as tall since it doesn't have a removable bullet. It's more like the bottom half of the large lock body and that's all. The way the big lock is made, You can put the links of a chain up to 5/8" thick in the sides of the lock instead of using the big loop of the hasp. I used to do that because the main part of the hasp was too thick with the plastic cover on it to fit in the links of my chain. Using the side notches makes it just about impossible to get a pair of bolt cutters on the links, and they won't even cut a chain that thick. The lock is about 5 1/8" wide, 1 11/16" thick, and 7 1/2" tall. The hasp is about 11/16" thick. It was just over 3/4" with the plastic on it. The small lock is the same thickness, about 3 3/8" wide and 6 3/16" tall. And the hasp is about 5/8" thick. According to my digital luggage scale, the big lock weighs 4.2-4.4 pounds and the small one is 2.2-2.4 pounds. And when I weigh them both at the same time they're a total of 6.4-6.8 pounds. So, roughly 6.6 pounds, 3 kilos, for the pair.
I haven't had a single ATV stolen since I got the Xena lock and square-link ABUS chain. The first 2 that were stolen at the same time weren't locked up. Then I started chaining them up with a tow chain and what I considered to be a large padlock. They cut the locks twice and the chain once IIRC. I know they cut the chain and the lock but don't recall how many times each. But they stole 2 more ATVs. One was recovered by the police, then stolen again. So it was a total or 4 ATVs stolen but you may as well say 5, since they came back again to get that one after it was fixed. The thefts started right after a bunch of black people from the north end started going to the church across the street from me. I think someone burned their church down intentionally, so the church by me said come on over. The one ATV that was recovered was being ridden down the street on the other side of the city by a black teenager. There were many holiday weekends I couldn't go riding up north because my ATV was just stolen. After I started using the big lock and chain, one of my friends called before a trip up north and couldn't believe my ATV wasn't stolen yet. She asked if those black people were still going to the church across the street from me and I told her no. Draw your own conclusion. The best security may be a big lock and chain, or it may be not having a bunch of evil church people from another neighborhood come by, eyeballing your stuff every week.