No bristles are fairly soft but I also used it for the side of my hous and the handle broke by pressing hard to clean.
I don't know why this question was directed to me as a consumer. It should be answered by Home Depot or the manufacturer. As a consumer I don't have the ability to make refunds on Home Depots behalf.
No, you can't purchase additional extension on this
Mine says it was made in China.
I do on my RV. Hooks to the garden hose. Will have to use a bucket with soapy water to dip the head in.
Hooks to a regular garden hose.
Yes it does. There is a yellow on and off switch at the edge of the handle and extension.