If my trailer has a bunk or roller that KeelShield will rest on, will it work ?

It will work as long as the KeelShield (after it is installed) Does Not rest on the bunks or any weight bearing rollers. The KeelShield Can Not come in contact or rest on bunks or weight bearing rollers even when unloading the boat from the trailer. If the roller or bunk is further down and your KeelShield doesn't rest on it when you are trailered, you still need to be sure that when you launch that you try to float the boat off of your trailer so your KeelShield does not get caught on it.