●They are made of metal and plastic, are lightweight and small, not easy to damage and can be used for a long time. ●The H4 headlight plug is made of high-quality materials that guarantee your safety and can withstand high temperatures. ●The H4 lamp repair holder connector plug is a great replacement for your broken, corroded, burnt or even melted lamp holder. ●Works with H4 bulb connector adapter. ●Package includes: 4 x H4 3-pin headlight replacement plugs and 12 x clamps