20 types: 8 compression, 12 extension 10 pcs comp. 9/32" x 1/2", 10 pcs ext. 13/64" x13/16", 10pcs comp. 3/8" x 5/8", 10 pcs ext. 5/16" x 1-1/8", 10pcs comp. 1/4" x 13/32", 10pcs ext. 7/32" x 1", 10pcs comp. 3/8" x 3/4", 10pcs comp. 7/32" x 11/16", 10pcs ext. 1/4" x 7/8", 10pcs ext. 5/16" x 1-1/4", 10pcs ext. 11/32" x 1-27/32", 10pcs ext. 5/16" x 1-3/4", 10pcs ext. 9/32" x 2", 10pcs ext. 5/32" x 3-1/8", 10pcs comp. 23/64" x 1-3/8", 10pcs ext. 3/16" x 1-3/4", 10pcs comp. 7/32" x 1-1/2", 10pcs ext. 9/32" x 1-1/2", 10pcs comp 9/32" x 3/4", 10pcs ext. 11/32" x 1-7/16".