Bit Holders, Bits, Sockets manufacturer / supplier in China, offering OEM/ODM Carbon Steel Square Weld Nuts M4-M12 Made in China DIN929 Compliant, Quick Delivery OEM DIN929 Hex Weld Nuts M5-M16 Carbon Steel, Steel Hex Flange Weld Nuts M5– M16 DIN/GB Standard High Strength Fasteners and so on.