What's the difference between an empty drum hammer and a tour guide flagpole?

The difference between an empty drum hammer and a tour guide's flagpole is.

1, the empty drum hammer is a tool used to detect the quality of a house during house decoration. Knock on the wall or ground with an empty drum hammer and listen carefully. If the sound is crisp, it means that the surface layer and the base layer are firmly pasted and the quality is qualified; On the other hand, if the sound is dull, it means that there is a gap between the two, that is, there is an empty drum and the quality is unqualified.

2. The tour guide flagpole is a tool used by tour guides in tourism activities. Generally, it is a long pole with flags or bright signs hanging on it, which is used to guide tourists, convey information and mark the location of tour guides.