Provide 4 specifications to choose from: 4mm, 5mm, 6mm, and 8mm, suitable for different devices Make from 304 stainless steel and aluminum alloy to ensuring long terms in humid and corrosive environments Smooth surfaces and clear threads ensuring easier installation and reduce wear on accessories The integrated handle design allows for easy tightening or disassembly without the need for tools, making it particularly suitable for situations that require frequent Not only suitable for photography equipment, but also widely applicable to various mechanical device and projects, Manufacturer: Zeizafa