A complete video guide to replacing a shattered iPhone 7 screen from start to finish. It helps to get a good quality replacement screen and a decent tool kit, these can be bought individually or in a bundle from as little as $25.
Make sure you keep all the screws really well organised when removing them so that you know which ones go where, there are a number of different types, sizes and lengths of screws.
Here are the purchase links for good quality replacement products and tool kits:
White Screen & Tool Kit – https://amzn.to/2NA5BLq
Black Screen & Tool Kit – https://amzn.to/2NCK5pB