Made from impact grade chrome molybdenum alloy steel. Fully guaranteed. Includes heavy duty blow molded case, over 30" tall. Includes wheel kit and grip handle for easy maneuvering Because of the extended size range of this set and the deep length of the industrial grade Cr-Mo steel, this set is extremely heavy, thus, we have added a wheel kit for added convenience that enables the user to pull the set behind them to the desired workspace. All sockets in this set are fully guaranteed. 6 point deep socket sizes include: 3/4", 13/16", 7/8", 15/16", 1", 1-1/16", 1-1/8", 1-3/16", 1-1/4", 1-5/16", 1-3/8", 1-7/16", 1-1/2", 1-9/16", 1-5/8", 1-11/16", 1-3/4", 1-13/16", 1-7/8", 1-15/16",  2", 2-1/16", 2-1/8", 2-3/16", 2-1/4", 2-5/16", 2-3/8", 2-7/16" and 2-1/2".