These quick release connectors for garden hoses are made of heavy duty brass which is solid and durable. This is a well made and quality connector for a reasonable price. They connect easily and disconnect just as well, I would suggest using a little silicone grease or O-ring lubricant on the O-rings before using them to make sure they can work best and seal properly. These come in very handy indeed when running long lengths and various valves and connectors. These 100% brass hose connectors are good quality, easy to install and no leaks, which will be the garden watering essential accessories.