Product features and benefits: complete set with 18 sizes: the right size for any job, every time; chrome vanadium construction: made from the highest quality alloys for long-term durability. Product specifications: sizes: 1, 1-1/16, 1-1/8, 1-1/4, 1-5/16, 1-3/8, 1-7/16, 1-1/2”; type: Long.