superior traction. the nike premium replacement studs are designed to replace a broken or worn out studs and will suit any of the latest nike football boots. the replaceable studs are longer than the originally supplied studs for maximum traction on an extremely wet and muddy pitch. each set comes in a small tube for convenient storage.. benefits. new replacement studs for ultimate traction. longer stud length for more traction on wet and muddy pitches. interchangeable for personal preference and varying pitch conditions. traction. created for dynamic changes of direction and optimal traction on soft-ground surfaces, the metal studs are detachable and interchangeable with the different lengths.. product details. screw-in fit. metal. small tube included for easy storage. size 1. 4 x 11mm. 2 x 13mm. size 2. 4 x 13mm. 2 x 15mm.