iGrip tire studs are made from hot-dipped steel to maximize durability and thermally galvanized with a zinc coating which acts as a shield against corrosion. A tungsten carbide tip is welded to each stud to amplify continuous traction. This is possible thanks to the exceptional anchoring depth our studs achieve in ice. Please note that an installation tool is included in each box.FEATURES Enhanced traction Oversized and pointed tungsten carbide Hot-dipped steel and galvanized stud Prevents sinking in the tire Big tread for good anchoring Lasting durability Light Easy to install and dismantle APPLICATIONS 06 mm: Motocross Enduro/Fat-bikes ATV 11 mm: Safety boots Motocross Enduro ATV 15 mm: Motocross Enduro ATV 18 mm: Motocross Enduro ATV 28 mm: Snowmobile Motocross ATV 32 mm: Snowmobile Motocross ATV