A Swiss company called UrbanAlps has developed a 3D - printed key that is almost impossible to locate . Called the " Stealth Key " , it is manufactured from titanium using a 3D printing process called selective laser melting , and takes advantage of the technique 's ability to print objects from the inside out to conceal an unusually complex pair of teeth behind a pair of flat , narrow ledges , which both insert the key into the hole and keep the object hidden from view - and thus benefit from duplication efforts , including smartphone scanning .
A Swiss company called UrbanAlps has developed a 3D-printed key that is almost impossible to copy. Called the "Stealth Key", it is manufactured from titanium using a 3D printing process called selective laser melting, and takes advantage of the technique's ability to print objects from the inside out to conceal an unusually complex set of teeth behind a pair of flat, narrow ledges, which both guide the key into the lock and keep the teeth hidden from view - and thus hidden from duplication efforts, including smartphone scanning.