Nurge Beech Wood Needle Punch Hoops are 37mm ( 1 1/2″ ) deep and ideal for Punch Embroidery. 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 that has been finely 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. Hoop is approximately 10" in diameter.