When you need to tighten and loosen fasteners, the Proto J5336MCF 36 mm Metric Crowfoot Socket Wrench is a tool you will want to have on hand. The open end allows you to slide it into position from the side. The 36 mm metric crowfoot socket wrench has a full polish finish that protects against corrosion and increases durability. It is made of alloy steel with a 3-13/32" overall length and weighs 0.75 lb. This 1/2" drive, 36 mm metric crowfoot socket wrench is an essential for anyone who works with nuts and bolts regularly.