TLQ&reg; Premium Film 0.2mm Real Tempered Glass Screen Protector for Pebble Steel Specifically designed for Pebble steel smart watch High HardnessGlass material after high tempered steel processing,surface hardness up to 8-9 h,impact resistance is strong,not easy scratches Ultra-high light transmittance: (transmittance of 98% or more) optical transmittance grade, ultra-low reflection, high Transparency High sensitivityThe glass is coated on the back with a strong silicon adhesive that makes installation easy and attaches the film firmly so as to not affect the touch screen's sensitivity Automatic bonding,High quality antistatic adsorption film ,make the product bonding and separation simple,easy to operate. it will automatically bond the screen.