The Craftsman 5.5 mm 16/64 7/32 wrenches are durable and reliable hand tools designed for automotive repairs and maintenance. With a 12-point drive type, these combination wrenches are perfect for tightening and loosening nuts and bolts with precision. The SAE system of measurement ensures compatibility with a variety of vehicles. This single item set from Craftsman, with the manufacturer part numbers 43941 and 44591, is a must-have for any DIY mechanic or professional auto technician.