There are various types of cannon nails, including ceiling nails, pipe clamp nails, fire studs, wooden keel nails, and hook nails. According to different calibers, gun studs are divided into large and mini models. The head diameter of the large gun stud is generally 8.3-8.5mm, while the head diameter of the mini gun stud is 7.2-7.3mm. In addition, ceiling nails can be divided into different specifications based on the model (screw hole), including 6 (M6), 8 (M8), and 10 (M10).