This Stahlwille Offset Ring Spanner is drop forged from high-grade special steels and chrome plated. It is extremely strong yet lightweight due to Stahlwille's double-T profile. The unique plating method prevents the problem of chrome flaking. The spanner has a metric size of 16mm and 17mm, with an overall length of 255 mm. Material is Alloy Steel and the finish is Chrome. The MPN is 41041617.