Not sure if this is the best design for a blade box. It would be easier to open if it had a place to hold the top while I slide out the inner part. It locks perfectly, and the case was made to absorb the impac.t instead of beign very resistant. That beign said, it is very convinient to have the zero and a spare blade with me during my travels. I carry only few personnal items during my trips, and this one was definitely a good aquisition. I can make my beard a draw the jaw line like I was in a barber shop.