2 Blue Billet Aluminum Window Crank Handle Winder For Truck/Car Pickup Door for Chevrolet Silverado 1500 Made from weapons grade aluminum Instructions included with purchase, easy to install Includes 2 cranks along with three types of adapters: (2) 1/2 round fix ring, (2) 3/8 square fix ring, (2) 7/16 inch round with 16 spline fixed ring included in kit.