9. Amerimax Home Products 636025 Lock-In Gutter Guard, Black 

Compatible with 4", 5", and 6" metal(steel or aluminum) K-style gutters

The tight expanded metal mesh pattern keeps outmost debris, to keep your gutters flowing freely.

Constructed of durable powder-coated steel for longlife and protection from the elements, and neutral color blends seamlessly withroofline

Easy "lock-in" installation, simply slideunder the first row of shingles and lock the gutter guard to the front lip ofthe gutter.