For nearly 40 years, Allied International has been committed to satisfying what you look for in Hand Tools- products that perform at an outstanding value. We stand behind everything we build and a Guaranteed Forever warranty for the life of the product. This Combination Wrench Sets has been tested and meets or exceeds ANSI standards for hardness and torque. The Wrench has 12pt construction which allows for more contact points for versatility and more access. This item is constructed out dropped forged and heat treated carbon steel. We have a full range of sizes, including jumbo in both SAE and Metric.