iPhone 5s Bumper, SQUAIR Duralumin Bumper Quattro for iPhone 5s/5 This revolutionary Quattro Bumper uses no screws even though it is made entirely from solid metal. We have invented the ITOIGAWA Latch (patent pending) for this product which allows the bumper be assembled and dissembled without tools, allowing easy changes of SIM cards. Anodized Extra Super Duralumin A7075 is specially engineered to give gentle feel. Dimpled finish on the side of the bumper provides good look as well as superior hold. Combined with smooth curves, you will enjoy a soft and secure feel whenever you hold your iPhone. An incredibly light yet exceptionably hard aircraft grade Duralumin A7075 is used for this bumper. The special latch structure allows the product be made from 100% Duralumin. The dimpled finish helps reduce the weight further. Only 17g, the same weight as a CD, this bumper carefully protects your precious iPhone. The Quattro bumper is milled from blocks of Duralumin with 0.4mm precision. Beautiful to look at dimpled finish requires an innovative five-axis machining device, and the special latch requires less than 1/100mm precise to manufacture. Material and advanced industrial technologies from Japan are essential for creating this beautiful bumper.