Professional Gutter Guard is your DIY gutter protection. Our guards come in easily manageable 4 ft. length and each guard requires (6) " #8 stainless steel zip screws. The installation requires minimal tools; a ladder, power drill, and a chop saw with metal cutting blade. The guard attaches directly on top of your existing gutters with (3) " zip screws inserted along the top front edge of the gutter and (3) " zip screw inserted along the back flange into the fascia board. These are the best gutter guards for the money, hands down!