Im using a KenRup strop and it has a leather tie with it.. and just slop that over a door knob.. but this weekend i was in Buahaus and they had LIFELINE PELICAN HOOKS they were only like 8 euro so im planning to run a 6mm carrrage bolt thew the wall with wooden plate on the bolt side and the hook on the other. for me as long as i keep the bolt hole in the tile on one side and fill the other when i leave IM GTG. (PS yes its over kill but it should look cool as he11)