Manufactured from 6061, these impeller sockets are offered as a low cost alternative to the steel Berkeley socket.  They work great for a low impact weekend warrior who wants to save some cash. Just don’t expect them to survive your daily grind or hardcore abuse; these sockets aren’t intended for high use. If you’re looking for affordable performance without the bells and whistles, this is your go-to. Perfect for those who want function without the price tag drama.