The Xtendor® Universal Guard will fit almost any plow and add more life to your cutting edge than any other plow guard.
Install your guards wherever you notice the most wear on your previous blades. Keep in mind, if a blade is already worn in, the guard could hang lower than the blade. That will require the guard to wear to the same level before you will begin clearing evenly. (It is highly recommended to install new guards with new blades to achieve max cutting efficiencies)
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)