Proxxon industrial 8 piece slimline double ring spanner set proxxon 23810 p set of 8 proxxon industrial slimline double ring spanners made from drop forged chrome vanadium steel with an easy to hold smooth finish these spanners offer optimal surface protection by means of double nickel plating and single chrome plating p p p proxxon industrial 23810 slimline double ring spanners set 8 piece