Kit includes: Cogged Balance Wheel, Timing Belt, Plastic Hand Crank Handle, Shoulder Bolt, Set Screws, and an Allen Wrench. The hand crank allows for sewing use when electricity is not available.;Use on Ultrafeed LSZ-1 or LS-1 Sewing Machines and works with the standard clutch or the Sailrite Patented Posi-Pin system;Greatly Increases Slow Speed Power and Control;7 lb. Solid Nickel-Plated Steel Balance Wheel;Made Exclusively by Sailrite in the USA