The JS Hook System, available through A.M.A. Hydroponics, part of A.M.A. Plastics Ltd., reduces tomato hook installation time by as much as 30 percent, meaning significant labor savings. Pre-wound tomato hooks save growers time and allow consistent twine adjustments as the crop develops. Hooks are unwound regularly to allow the crop to drop as the vines grow longer. Hooks can be shipped with one or two colors of twine in a single case; for example, all white or alternating a white hook and a green one.