The ISI Traction Strap provides counter-traction on the patient's humerus while the Finger Traps and ISI DigiGrip work with your I.V. Pole or traction boom. S-hooks are used with the Traction Strap and Soft-Grip weights can be added. An inexpensive upper extremity traction system can be created, ideal for casting procedures or surgery. Latex-free.