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Powerful drilling screw can perforate the steel plate thickness from 2.3mm to 9mm.
a square bit for the screw is attached.
quantity : 5x19 (83pcs/box), 5x25 (70pcs/box), 5x35 (56pcs/box)
30 boxes/ carton box
It is used with an electric screw driver .
powerful drilling screw
