All of our solid brass locks are completely handmade and each has its own specific locking mechanism so that no other key will unlock it but the one designed especially for it. The largest "partners locks" have 3-5 hand filed keys with a master key that enables you to lock out your partners should you fall into disagreement. Some have interesting and pretty double sided keys, some have neat swinging keyhole covers, all are unique in their own different way. They are as beautiful as they are functional. As a lock, paperweight, or just a fun work of art on your coffee table or mantle they will surely be a conversation piece, and makes a great gift for the person who only thought they had everything.