Designed for car repairs and garage jobs. This set is chemically blacked for corrosion resistance and manufactured from durable Cr-Mo (chrome molybdenum) steel, which is stronger and more impact-resistant than standard chrome vanadium. The set includes: 1/4" F x 1/4" M, 3/8" F x 3/8" M, and 1/2" F x 1/2" M universal joints. Made by Yato.