Material and durability Chrome plated carbon steel construction provides resistance to high temperatures, corrosion and wear for a long service life. Size identification Each crowfoot wrench is clearly marked with its size for quick and efficient use, reducing time spent searching for the right tool. Wide compatibility The kit includes sizes from 10mm to 22mm and is compatible with 3/8" drive head tools, making it adaptable to a variety of tasks and working conditions. Open end design The open end allows fitting over nuts and bolts of different sizes, enabling easy loosening or attachment even in deep or hard-to-reach places. Use scenarios - Automotive maintenance in tight engine bays or cramped components where space is limited. - Motorcycle or bicycle servicing in restricted areas such as under frames or near exhausts. - Appliance or equipment repair where access is obstructed by panels or other components.