. This boat rudder kit includes rudder head and aluminum blade (tiller handle omitted). It affixes to Walker Bay 8 Sail Kit boats as a replacement part. Head and blade assembled together measurements combine to 37 ¾”L x 10 1/2”W.Rudder Kit install detailed on page 3:www.walkerbay.com/wp-content/uploads/2014/02/WB8-Performance-Sail-Kit-Assembly-Instructions-2014.pdf