Our Saw Blade Warhawk is Approximately 17" long. Try on this killer helmet spikes for an instint attitude adjustment!! No drilling required. Our Warhawk comes with two-sided industrial grade tape that becomes stronger with time. It is applied directly to the top of the helmet, just peel off and apply. Length is easily adjustable to your helmet with the use of scissors. All sales final due to the one-time application method. Helmet is not included.