Enhance your tool collection with the Mac Tools USA 4pc Multi-Dr IMPACT Extension Set SP4EBP. This set includes specialty design for impact use of 3/8″ and 1/2″ sizes with a black oxide surface finish. The set is perfect for those who work with vehicles and requires a precise fit for their needs. The set comes with four pieces of sockets and adapters, making it an ideal choice for those who need to work with specialty systems of measurement. The Mac Tools brand is known for its high-quality products, and this set is no exception. Manufactured in the United States, this set is a must-have for any mechanic or DIY enthusiast.