Stahlwille series 24 double ended open ring spanners metric drop forged from high grade special steels and chrome plated manufactured to din 3118iso 3318 the spanners are optimally hardened in continuous furnaces with no scale build up or skin decarburisation and are gently quenched in oil they are extremely strong yet lightweight due to stahlwilles double t profile the unique plating method prevents the problem of chrome flaking the ring ends of the spanners are equipped with anti slip drive pr