Expensive but worth it
If you have a need for high security locks, you can't go wrong with the protec2 locks. The protec2 locks are very solid and to date have not been picked or bumped. These locks have both an inside and outside key. The inside key makes it so that you can lock the thumbturn and then you can't open the lock from the inside or the outside without the key. This is a really nice feature for when we go on vacation as it allows us to lock the door from being opened on either side. The locks are Grade 8 hardened steel