Designed in Australia and tested to meet or exceed U.S.Department of Defense Standard 810F/G durability tests, the Duxworks seamlessly with your new Surface its Type Cover and pen.Tough, reinforced TPU and polycarbonate construction protects frominadvertent drops. Slim and lightweight design yet superprotective. New Infinity Hinge stand allows for almost limitlessviewing and typing angles. Rubberized feet prevent the device fromsliding on a smooth surface. Easy installation or removal of thedevice without the need for any tools. With built in pen storageand clear back panel for asset tagging or a custom look, yourSurface Pro 4 never had it so good!