La Cerradura Doble
"La Cerradura Doble was Robrecht Louage’s 2008 IPP Design Competition entry. The puzzle was very interesting to me, so I contacted him and started chatting about it. This puzzle is milled from solid stock, and there is no mistaking it for a cheap mass produced item. Weighing in at a hefty 12 ounces, the craftsmanship is evident when you see the slight tooling marks. The keys are milled from solid Stainless Steel; a very tricky material to work with. The base and sliders are milled to precision from solid Corian.
As a puzzle I found it quite enjoyable to solve. There is only one solution to remove both keys. Putting them back in is even more of a trick, since there are plenty of dead ends to find along the way." -Eric Fuller