Speed up your chain piecing with this groovy thread cutter! Add an old rotary blade to the center and quickly separate your chains. Wouldn't it look nice sitting next to your sewing machine? Both the blade holder and base are reversible. Blade holder measures approximately 2.5 inches in diameter and 0.5 inches thick. Base measures 2.75 by 1.75 in and 0.5 inches thick. Made from acrylic, secured with a brass boston screw.