SupaStuds Sharp Stud - 4 PackSet of 4. The best hold on the firmest ground. 15mm length (excluding threaded section). Tip is quite sharp when new but quickly wears to a slightly more rounded shape this does not affect the efficiency of the stud in use. Why SupaStuds Award winning SupaStuds have a unique, self cleaning design which enables them to be screwed into a shoe without previously re tapping out the hole. This makes them far faster, easier and safer to insert than