They definetly want you to buy two.

I am using Knipex pliers and "RC car wrench" with 4, 5, 5.5 and 7mm sockets.

There is image of that wrench. You can get it a lot cheaper on aliexpress.

https://www.amazon.com/ShareGoo-Wrenches-Maintenance-Sleeve-Spanner/dp/B074VD6ZRB/ref=mp_s_a_1_3?crid=1TZ3MKN3NMZAZ&keywords=RC+car+wrench&qid=1672916450&sprefix=rc+car+wrench+%2Caps%2C248&sr=8-3