These spiral hooks, plastic sheathed, in the color black, are for the self-production of expander loops or expander double hooks in 6, 8 or 10mm diameter. These spiral hooks can be used to make tarpaulin tensioners yourself and thus securely fasten or fix nets, tarpaulins or other things. The plastic sheath of the hook has the advantage that e.g. the tail lift can not be scratched. The set consists of 1, 10 or 100 pieces. To close the expander rope use rope clamps, article 70110