The ISEO R11 what The First dimple lock I ever bumped. I'd made the bump key myself, filing grooves right across the blade. It took a while, but finally it opened and I went CRAZY! Very few people were bumping standard cylinders then, let alone dimple locks! Thankfully, things have got a lot better and we now have thesis perfectly cut from code ISEO Bump Keys R11. A slick and no nonsense bump key for your pure pleasure bumping.