Features: It is an automatic rewind type.It can be installed on wood, iron, aluminum sashes, and concrete.Uses an ultra-strong magnet (magnetic flux density 130mT).The case is made of ABS resin and elastomer resin and is molded as a single piece, making it non-slip.It is equipped with a needle lock mechanism to prevent the needle from jumping out.Uses fluorescent yellow thread for easy visibility.The guide thread structure allows you to easily replace the thread without opening the main body.
Applications: Architectural plumb bob holder.
