Stahlwille Series 24 Double ended open ring spanners. Metric, drop forged from high-grade special steels and chrome plated. Manufactured to DIN 3118/ISO 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 Stahlwille\'s \'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 profiles to permit high transmission of forces to the flats of the nuts and bolts without damaging them. MADE IN GERMANY.Stahlwille Double Ended Open Ring Spanner. Size: 10 x 12mm.Length: 160mm.