Large diameter foam tubing is easy to grasp for those with arthritis and ailments of the hand. The stainless steel wire loop goes through the clothing eyelet and secures the button to allow it to be pulled back through the eyelet. Handle is 1 3/8″ diameter, overall length is approximately 7 3/4″. Zipper-Aid model has small 5/8″ brass plated hook to pull zipper.