Instructions for use: 1. Due to the different positions of the back cover with different force capacity, it is recommended that the camera module of for iPhone11 and above models can be used directly for repair. (It is recommended to use after removing the camera, face ID, battery and motherboard) 2. It is recommended to adjust the rear end spring for the glass back cover of other models, and loosen the rear end cover to adjust to proper strength before use, so as not to damage the back cover. 3. Do not use a screen beaking tool to blast the edge of the glass back cover. 4. Pay special attention not to break down the wireless charging. coil in the middle of the glass rear shell! Product name: Mobile phone glass back cover blasting pen Product model: iRock5 Net weight: 41g Product size: 102 x 18 x 18mm Product use: The application covers most of the glass structure mobile phone back cover and camera module in the market Colour: gray Material: metal Package Contents: 1 x Glass breaking pen Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store