SourceOne Donation Box with Sign Holder & Lock - 5" Wide Secure Charity Collection Box for Churches, Schools & Events (1 Pack, Black) - Perfect for Fundraising, Donations & Cash Collection

This is very small but It worked great for what we needed it for. I hate those big overbearing boxes. This is great for a small show for people to throw a business card into. It worked great for us.And YES you can lock it. The lock goes on the left hand side on the bottom back of the box. There is a little hole you put it through. But don't think it will keep anyone out. It is like one of those diary locks. but I think it is more to keep it closed then to lock peoople out.