Nurge Beech Wood Needle Punch Hoops are 37mm ( 1 1/2″ ) deep and ideal for Punch Embroidery so that they can handle a range of deep loop stitches without the needle going beyond the depth of the hoop. They are of superior quality and made from hard beech wood ~ fine sanded and hand polished for a super smooth natural wood finish. The adjustment screw and threaded angle brackets are made from pure brass and polished for a rich, striking gold colour look.