Delivers precise amount of traction tension. Simple, portable device eliminates the water weight bag used by most home overdoor traction systems. Compression spring and ratcheting device allow accurate adjustments to the amount of cervical traction tension. Each click increases the tension by one lb. (0.5kg), up to a maximum of 25lb. Allows patients to self-monitor and track settings. Specially designed head halter is easy to put on and remains comfortable even as traction is increased. The Neckpro II now includes a new and improved door bracket to fit more door sizes up to 44mm.