Shinshi is a tool for use in Arai-hari of Wafuku (Japanese traditional clothing) (a Kimono cleaning technique of laying or stretching out a starched Kimono to dry) or dyeing fabrics by sticking each of its ends into a longer edge of the fabric, respectively, so as to stretch out the fabric in the shape of a bow (a type of weapon) and support it while keeping its width without shrinkage.
伸子（籡、しんし）は、和服の洗い張り（洗濯）や反物を染色する際に、用布の両長辺にその両端を刺して弓(武器)形に張りわたし、布を縮ませず、幅を保たせるように支えるための道具。