? Size?The rung lock kit approximately 8" long. Our extension ladder accessories includes 2 ladder rung locks, 2 bolts, 4 nuts, 4 washers and 1 x Instructions. ? Compatible Models ?Our aluminum extension ladder locks compatible with Werner aluminum 24 ft, 28 ft, 32 ft extension ladder. The extension ladder part fit for Werner D1300 series ladder, D1200 series ladder, 250lb rated made after 2002. ? Excellent material?Our aluminum extension ladder locks are made of highly durable high-quality raw materials, which has been precision tested, sturdy, damage resistant and long use life. Even after collision and wear, it does not affect the use. ?After sale?If you have any problems please kindly contact us by logging in your Amazon Buyer Account , Find your order and click Contact Seller we will respond you in one business day .