The Quinn 1/2 Drive 5in Impact Extension is a durable and reliable hand tool designed by the brand Quinn. This specialty extension features a SAE measurement system and a black oxide surface finish, making it perfect for automotive repairs. With free USA shipping, this single item set includes a 1/2" x 5" extension that guarantees a lifetime warranty. Made in Taiwan, this high-quality tool is a must-have for any mechanic or DIY enthusiast looking to expand their socket collection.