I used a rubber hammer, a plastic hammer, an iron hammer to hit a gong, but I heard it because the sound of a tree hammer sounds good. I thought that it was white at all, or whether the hammer part hit the knot or the boundary between the wood grain, or a white and brown two tone color hammer of unfortunate color sent to me. I feel something unconvincing. I think that monochrome hammer was good at home center. It is difficult to bother to make it two-tone color.