To answer a few questions about this brush: 1) The bristles are dense and relatively soft, but not too soft . I used it on one of my guitars and it's soft enough not to scratch the finish like many other "hard" brushes can. 2) The body and neck are plastic, but the neck and inner collar compress a little, so not very stiff. , inflexible plastic. 3) A minor complaint might be that the bristles are a little short (1/2 inch across the inside, flexible collar) which doesn't allow for deeper areasβ¦