Perca Original Flexible Coffin Weight It is realy hard to wind up in something with the Perca Original Flexible Coffin Weight. Safety instructions: Fishing equipment may only be used for fishing. Not a children\’s toy! Use with caution, do not swallow (risk of suffocation). Possibly small parts, sharp edges or sharp hooks: risk of injury. Keep away from children or ensure appropriate supervision and keep out of the reach of children.