Alpha-x Smart Watch Screen Protector with Aluminum Frame for Apple Watch Iwatch Metal edge full coverage, more perfect protection for Watch 9H Hardness: Glass material after high tempered steel processing,surface hardness up to 9H Anti-oil coating, avoid smudges and reduce the fingerprints Automatic bonding: High quality antistatic adsorption film ,make the product bonding and separation simple,easy to operate. it will automatically bond the screen Material: Tempered glass +Aluminum-magnesium alloy