Neiko 02487B Cr-Mo 1" Drive Impact Socket Set for Truck and Tire Service Precisely machined, heat treated black chrome molybdenum steel provides excellent durability and strength with every impact movement Wide range of socket sizes to fit multiple applications including 4 piece deep: 33mm, 35mm, 41mm; 3 piece square: 17mm, 19mm, 21mm Specialized one inch drive impact socket is a perfect fit for mechanics working on cars in garages or workshops High-contrast permanent laser etched size markings are easy-to-read for easy retrieval Blow molded hard plastic storage case provides a convenient handle for easy travel and portability