Junk - Skip this article - A child can open this with a screwdriver without making too much noise make . less than 10 seconds. Just use a screwdriver to open the weak lock door which has a weak locking pawl. Really bad. Then use the same screwdriver to turn the screw inwards. You don't need to use the special tool included in the kit. The metal is thin/light. This article sucks. If you have already bought this, return it as soon as possible. It won't even stop a scammer. Yes, this perforator is annoying. I should have cut it off too - Scott