Hello, for the Ford Ka of my Freudin I recently bought used summer tires. Once back home it was noticeable that the rest of a screw was in the rubber in one of the tires, which the previous owner had probably captured/introduced. The screw stuck diagonally about 1cm in the tire or in the profile. After pulling out the screw the tire did not lose any air. Since I am not an expert the following question: Can one still drive with the tire? How thick is the rubber layer of a tire before the air comes? What could be done to examine the dance more closely – or is this not necessary at all? Thank you and greeting