INS Fathead Studs with "Hornet" technology are acknowledged as the best studs in the business. They have superior penetration with a 70 Degree rimless tip and slim profile. These studs have a 1.2" base to prevent "pull through's" in single ply trail tracks. We install these in all Ski-doo Xp & XS trail sleds with proper tunnel protection. These are also nickel plated and have a factory warranty against bending and breaking ( see mfg. website for warranty details and procedures).