This vintage 12" adjustable wrench is made of durable Diamalloy steel and was manufactured by Diamond Calk Horseshoe Co. in Duluth, Minnesota, USA. A perfect addition to any mechanic's tool collection, this wrench is in excellent condition and features the Diamalloy brand name. Made in the United States, this tool is a testament to American craftsmanship and durability. Whether you're a collector or a working mechanic, this DIAMALLOY STEEL Adj Wrench is a must-have for your toolkit.