Retractable anti theft pull box for ring display 1. Mainly used in super market, retail shops and exhibition to prevent the showing objects, such as jewelry, bracelet, clocks and watches, glasses, digital consumer and other small items being stolen. 2. Pull box surface with strong 3M double-sided sticker or fixed to a shelter, the counter contraction rope buckle with ring at one end, a variety of forms such as anti-theft lock screw, stick and join of commodities, we can make according to the different kinds of joint- mode, to meet various needs. 3. Many client find us ODM for accommodating their work purpose or hanging tools. 4. Other client find it for customize for accommodating their own product use, such as dog leash. If you need customize, please let me know: Name: D-shaped Reset Display Positioning Pull Box Size: 35.2x28x16 mm Material: ABS Plastic + Metal Color: black/white or customize Cord Diameter & Length: 0.45mm          max 90cm 0.6 mm            max 60cm Cord Retracting Force:0.5--2 LBS Accessory: copper pillar or am-phenol connector, sticker or L-shape alley key Retracting Life: 50000 times