Adjustable wrench 1 High quality carbon steel drop forged 2 Heat treatment 3 Sand blasting, chrome plated Crome plated, drop forged ,carbon steel 1, High quatity carbon steel drop forged or Cast Iron2, Heat treatment 3, Sand blasting, chrome plated ,Zinc polishing/plating4, PVC dipped handle5.Marked with scale6.Smooth finishing 6''--18''