91vxl Is A Low-profile, High-performance Chain. Ideal For Arborists And Professional Gardeners Who Use Low-weight Chainsaws. The Cutting Edges Are 33% Longer Than Standard 91 Chains. The Reduced Vibrations And The Design Of The Cutting Edges Offer An Aggressive Cutting Surface And A Safe And Prolonged Sharpening. Features & Benefits • Lubritec ™ Keeps Your Chains And Guide Bars Oiled, Ensuring Less Friction And Longer Life • Blue Teeth Offer Maximum Corrosion Protection