Motion Pro 08-0073 Tappet Tool Set Heat treated and chrome plated for durability Interchange adjusters and wrenches for nine different combinations Fits most motorcycles and ATVs with screw type tappet adjusters Fits any screw-type tappet adjuster with 8 millimeter , 9 millimeter or 10 millimeter adjusting nut combined with either a 3 millimeter , 4 millimeter , square or straight screwdriver type adjusting screw