These studs are manufactured in the U.K. and are case hardened to a specification of Rockwell 55 then they are treated with Apticote 400N, which is to M.O.D specification. Available in: Standard Jump Stud - Ideal for additional grip on good ground Long Jump Stud - For wet and loose ground Pointed Jump Stud - For use on hard ground Dome Stud - For very wet and loose ground Road Stud - For roadwork – also for hacking and hunting Sold in packs of 50 studs