Expanding roller

The bottom structure of the semi-circular wire is closely combined with the roller body, which effectively solves the problem of slippage. The side of the semi-circular wire is combined with the roller body without gaps, and it is not easy to plug oil, dust, etc., keeping the roller body clean and effectively protecting the fabric. The vertical structure on the side of the semi-circular wire effectively improves the spreading ability. The top structure of the semicircular wire is in smooth contact with the fabric to avoid damage to the fabric.