HELIOS Retractable Key Chain With 29 Inch Cable And Belt Clip: CAM-80105 The plastic and metal case for this spring loaded key chain is 1-1/2 inches in diameter The retractable cable is 29 inches long, so you can reach the car door or the lock easily This retractable key ring has a 1 inch split ring on which to hang your keys This unit has a reliable spring loaded retractable feature that will work time after time This is an excellent way to prevent losing your keys - you can clip on your jeans, pants, etc!