Japanese scrubbing brush
A is a scrubbing brush for wet cleaning, of a style that is popular in Japan. Traditionally, "tawashis" were made from the hemp palm. In Japan, sponges used for rubbing and washing are now treated as forms of "tawashi". 
A is made of metal; steel, stainless steel, and brass are frequent choices. They may be used in removing scorching and rust.
Types.
Several synthetic polymers are frequently seen:
References.
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