I'll second the post above. If you're picking right, slimline will be fine for, like, 99% of the locks you come across. If you're worried about it, buy a standard short hook and put it in your kit as well. It won't cost but a few dollars and if you get it in the same order you won't pay 8 bucks to ship a 2 dollar pick. Believe me there's little more frustrating than that.