The Mac Tools AW135 3/8" Air Impact Wrench is a high-quality, single item unit designed for automotive use. With a drive size of 3/8 inches and an air inlet size of 1/4 inches, this impact wrench is perfect for a variety of applications. The product includes an air hose fitting accessory and is backed by a no warranty guarantee, making it a reliable and durable tool for any mechanic or DIY enthusiast. The Mac Tools brand is known for its exceptional quality and this impact wrench lives up to that reputation.