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.