The tool lanyard is a rope that connects a tool to the waist tool bag or belt so that the tool does not fall off when released when working at a height. Also called safety code, safety loop, etc. There are various shapes of the tip, such as types with a hook on one side and rope on the other side, types that have hooks on both ends, types that have canavilla on both ends, and types that have ropes on both ends. The rope is made of various materials such as wire, rubber, and cloth. Stainless steel wire and Kepler fiber are used for the core of the wire, and many of them have been improved in durability and flexibility by polyurethane processing. It is necessary to select an appropriate tool lanyard compatible with the place to be used, work content, the weight of the tools to be connected, etc.