self drilling screws
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Bi-Metal Self Drilling Screws
Bi-Metal Self Drilling Screws are fully corrosion resistant stainless steel drill screw, the screw locking part and head are made of austenitic stainless steel, the tapping part and end of the drill shall be divided into alloy steel (or high carbon steel). The surface is specially treated, Anti-corrosion life can achieve the ultimate effect.
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