drop forged,hardened and tempered, Zinc/chrome plating 60/2", 75/3", 100/4", 125/5", ... Production: 1.Zinc finish {white or yellow zinc}2.All Metal Construction 3.Drop Forged,Cold Stamped, ... Specification:1.Material: 45#Carbon Steel 2.Finishing: Zinc finish(white or yellow) 3.Size ... Company introduction: 1. 8 years professional manufacturing spanner 2. 66, 000 square meters area 3. 10 spanner ...