The Dyson cordless vacuum models come with an assortment of different motorized suction heads. All of them can be opened by turning a cap on the side or bottom with some sort of coin shaped tool.
But even their premium packages do - to the best of my knowledge - not include such a tool.
Here is a thing that fits the two most common sized found on Dyson cordless vacuum toolheads.
I also have created a motorized tool head wall mount that features a port to store this tool in while you do not use it.