Adaptador bobinas de hilo grandes maquina de coser. Large thread spool adapter sewing machine?

A mi esposa, al poner las bobinas grandes de hilo en el vastago de la maquina de coser, al ser fino y pequeño, a la hora de coser la bobina grande sale disparada y para eso he hecho este adaptador. He probado un par de bobinas grandes de dos tamaños y se adapta fenomenal.

Traduccion Google:
To my wife, when putting the big bobbins of thread in the shank of the sewing machine, being thin and small, when sewing the big bobbin it goes off and for that I have made this adapter. I tested a couple of large coils of two sizes and it fits phenomenally.