The Spearit V wishbone is designed specifically for making hand tied bands. Most V wishbones have oversized terminals because they are designed for mass produced bands with constrictor rings. The larger terminal makes them harder to insert and puts the rubber under permanent stress. Our standard wishones have small 6mm terminals that are easy to insert and easy on your rubber. Our larger 9mm terminal wishbones have extra holding power for larger diameter rubber or for those first time band builders that need a little more forgiving terminal while they master the constrictor knot. Rubber tubing and constrictor cord sold seperately in our Amazon store.