The FACOM FM-34.4 Open End Wrench is the ideal tool for tightening and loosening screws. This open end wrench has a short shank, slim head and overall length of 2 3/4 in. The 4mm x 2-3/4 in. wrench head size makes it perfect for working with small fasteners. It has a satin finish, alloy steel construction and one piece handle. If you are looking for an easy to use, durable tool to help tighten or loosen screws, this FACOM FM-34.4 Open End Wrench is just what you need.