Migatronic MIG wire spool adaptor designed for 15kg MIG wire spooled onto wire frame baskets which do not have the smaller centre or where the centre has been removed.
An example of the spools that don't have a center is the Bohler Union X96 MIG spools.
This MIG wire holder from Migatronic - 81899017 - is a good quality robust moulding produced from a single piece of plastic with a spring metal clip to retain the wire basket in place.