Heavy Duty Nickel Plated Metal Jailers Key Ring with 10 swivel attachment and 10 split rings - Large 150mm Diameter Hinged with screw clasp : Amazon.co.uk: DIY & Tools
Jailers Key Ring - Large 120mm : Amazon.co.uk: DIY & Tools
Large Threaded D-Shaped Jailer/Binder Ring, 150mm - bulk from £1.58 | OneStop Locks