Pointed studs featuring four flat sides and an extra strong, wear-resistant steel tip. The vertical grooves in the thread have a self-cleaning effect. This makes installation easier and quicker. The studs are made of galvanized steel, which prevents rusting. This stud type is particularly suitable for extra grip on hard surfaces. Length stud head: 21 mm. Width stud head: 12 mm. Length screw thread: 6 mm. Whitworth thread size: W3/8. Set of 10 pieces.