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About this item ★ Made of good quality material,nickel plated galvanised finished,wear-resisting and durable to use. ★ Made from galvanised carbon steel,these knurled head screws and thumb nuts are sturdy and durable. ★ Flat knurled screws thumb nuts can provide additional grip for manual tightening. ★ Knurled head screws are designed to be tightened and loosened by hand,which facilitates manual training. ★ Widely used for electrical appliances,tools,cars where screws need to be tightened and loosened frequently. › See more product details No Description