Screw in Hooks,Wall Cup Hook,Zinc/Copper Plated Strong Screws Hooks,Lag Hook Description: Material: Carbon steel,surface Zinc/Copper Plated Thread diameter:1.9 /2.2 /2.6 /2.9 /3.3 /3.7 /3.9 /4.6 /5.1 /5.54 /6.45mm Length: 16mm-105.2mm Standard:GB/T Heavy Duty Screw In Hooks are made from Mild Steel and Zinc/Copper Coated. They can be screwed directly into wood or plastic, or into a wall plug for masonry purposes.
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