Never scratch up your boat again! This patented, easy-to-apply keel protector provides a permanent buffer between rocky, sandy shorelines and your boat's valuable finish, keeping contaminants from grinding away at your hull. It's the only safe, sure way to prevent damage when beaching your boat -- and tests have shown that KeelGuard can actually improve performance and handling characteristics, especially on smaller boats! Installs in minutes with 3M? VHB pressure-sensitive adhesive and a specially designed burnishing tool (both included). Provides a lifetime of protection against corrosion and abrasion. NOTICE: If your trailer is designed such that the entire weight of the boat rests on rollers or a support beam along the keel, we do not recommend installing the KeelGuard. If the rollers can be lowered or the side bunks raised to clear the rollers, the KeelGuard adhesive bond will not be compromised. May not be suitable for some aluminum boats with reinforce rib design.