| HoopTech Back of Cap Clamps (Available in Different Sizes). Compact Clamp for Cap Backs is the easiest and fastest way to frame up a cap back. The extra large sewing field with locating points for centering, makes it easy to sew low across the cutout or high on the cap crown for those large design requests.... - HoopTech Back of Cap Clamps (Available in Different Sizes). |