Name of the bamboo tool used to scrape pottery in Vietnamese (Quê An village)

Võ Thị Sương says the name of the tool made of a slice of bamboo with both ends tied together, called cái “khót”, where “cái” is the classifier for objects. It is used to scrape pottery, both when preforming on wet clay and when preforming on leather hard clay. The use of scrapers makes the edge blunt. Those that are too blunt to be used during preforming are used during smoothing.