iMatch Heavy Duty Metal Case. Used to be on amazon, but I’ve had to get direct lately. Had it for Op6T, Op7T, and Pixel 7 Pro. It goes on, doesn’t come off (uses screws to attach case, NOT removable without hex bit), and protects from everything except direct screen hits. all 6 phones still work, even retired ones, so it’s good. I think I broke a standoff on the 6T case eventually, but it didn’t affect anything. Also the rubber corners are worn down. that’s it. Optional charging port cover, which I remove, and even a passthrough switch for the phones that have one. All the phones are pristine inside! At worst, the metal edges of the case have dings and scratches from drops. I’ve ordered 6 cases for 6 phones and have never had to replace them (even after 4 years of daily driving). Only problem is the limited availability of compatible models.