Talk with your operators and fleet managers to understand your environment and what obstacles your operators are faced with. Curbs can play a big part in determining which guards to order. If your routes have many curbs you may want to consider curb protection. If you have no curbs, a straight plow guard will work great. You will also want to note uneven wear and order blades that will help to alleviate that uneven wear. (It is highly recommended to install new guards with new blades to achieve max cutting efficiencies)