The cord connectors are made of metal and can unscrew to allow ends of cords to be joined together. Used for blind or light switch cord pulls.
Size is 2cm long by 12mm with a 3mm diameter hole at one end and a 4mm diameter hole at larger end.
The beaded chain connectors are used with roller blind chains. The white chain connector is plastic and the brass and nickel are both metal.
Length is 14mm long