NOT suitable for other Dyson models with similar looking fittings. These do NOT fit Big Ball, Light Ball, Animal 2, UP22 or UP24 despite looking similar.
The red button adaptor fits into your V7, V8, V10, V11 and V15 and allows most tools from the DC16-DC75 to be used (excepting certain cylinder tools).
The second adaptor fits into the first and allows usage of your V7, V8, V10, V11 and V15 with vacuum storage bags, Dyson tools from models DC01-DC14 and general 32mm tools from other machines. This adaptor also fits previous generation Dyson cordless models.
These adaptors do NOT fit tools from Dyson models DC11, DC15, DC19, DC20 or DC21 or any cylinder model floor heads.
Please check the extra photographs carefully to see examples of usage and tool fitments to be certain they are suitable for your application (the Dyson vacuum and extra tools/accessories are shown for demonstration of fitting purposes only).
There is an information video on Youtube if you search W5dGJjYFQjQ on that platform.
Please note: This is a non-genuine compatible spare part and any manufacturers names and/or part/model numbers are used for reference purposes only.