Jones Chain Release Roman Blind KitJones Chain Release Roman Blind Kit. This premium Roman Blind kit features the NEW 'child safety' Chain Release Control Unit. This new unit will release the cog from the headrail when a force of 6kg is applied, allowing the chain to fall freely from the track, avoiding any potential danger. The cog is cleverly designed to remain attached to the headrail, avoiding any small parts risk and can be easily reset by following the instructions. Kit contains