The Hakkotsu Thunder B snare wire kit allows you to build traps using Hakkotsu sound effect grenades. There is plenty of snare wire included, and the set is ready to use right away. At one end of the wire is a locking piece that can be placed in place of the grenade pin.
If you don't need a long trap line, it might be smart to leave the excess line in the cardboard that comes with it, making it easier to roll up the line after use.