I was shopping in a thrift store and noticed some Native American items, but this one item , I have no idea what it is or was used for. Looks like a large artist brush?? The handle is approx. 10 inches long, and 1 1/2 inches wide. The handle when first looking at it looks to be bamboo, but is not, it is a hollowed out bone and is polished with carved lines making it look like bamboo. Coming out from one end is a bunch or tuft of soft greyish horsehair. The hair is approx. 4 inches , so total length is approx.14 inches. Any one know? thx : )