Amerimax 6360 Metal Lock-In Gutter Guard, 3'Use the Amerimax 3' Lock In Gutter Guard to help protect your gutter from filling with debris. These gutter guards are compatible with metal K style gutters. The tight expanded metal mesh pattern keeps out most debris, to keep your gutters flowing freely. 3' Compatible with metal (steel or aluminum) K style gutters The tight expanded metal mesh pattern keeps out most debris, to keep your gutters flowing freely Easy "lock in" installation, simply slide