This is a quality stainless steel button head socket cap assortment kit that includes the most popular sizes. This kit contains: 10pcs 8-32x3/8, 10pcs 8-32x1/2, 10pcs 8-32x3/4, 10pcs 8-32x1, 10pcs 10-32x1/2, 10pcs 10-32x3/4 10pcs 10-32x1, 10pcs 10-32x1-1/2, 10pcs 1/4-20x1/2, 10pcs 1/4-20x3/4, 10pcs 1/4-20x1, 10pcs 1/4-20x1-1/2, 1pc Tuff Storage Container