Lacis-Nap Riser Brush. This detailer tool is used for needlework, knitting and crocheting. Used to brush the nap of napped fabrics, add brushed interest to an area of needlework or smooth stray novelty yarn fibers. Also great to tame the nap of velvet and corduroy. This 3.25x5 inch package contains one nap riser brush. Imported.