Each click of the rachet audibly signals an increase in the tension being applied. This not only allows traction to be delivered in a progressive format similar to what is experienced in a clinical setting, but the audible clicks allow the patient to monitor and keep track of the settings that provide a positive outcome. The specially designed head halter is easy to apply and comfortable even under high levels of cervical traction tension. Neckpro Overdoor Cervical Traction System includes Neckpro compression spring and ratchet assembly, head halter and overdoor bracket (fits doors measuring up to 1-1/2” (3.8cm) in thickness. Commercial size bracket available for doors measuring up to 1-3/4” (4.4cm) in thickness.