The Apple iPhone 3G Aluminum Case is manufactured with 100% anodized aircraft grade aluminum and the design of the case is form fitting for the Apple iPhone 3G devices. The neoprene lining located on the top, bottom, and side holds the Apple iPhone 3G securely in place. The Apple iPhone 3G's LCD screen is protected by a clear hard plastic to prevent scratches. The lock on the side holds the top and bottom of the case tightly together and prevents the case from accidentally opening. With this form-fitting metal aluminum case, your investment is protected.