"4 models solve all problems with clamping in bench and machine vices, e. g. with conical bolts or thin walled pipesConsist of a strong aluminium profile in an alloy, of which hardness lies between that of copper and leadThe prism jaws are produced from an anneald aluminiumThe prisms are rectangular and coplanar and fit in every vice, even in machine vices and they are suitable for production and mountingInserted special magnets cling the braces to the vice and they are only magnetic to the vice. Filings do not stick, and the fixed pieces are not magnetised"