Taiwanese tool set treated with carbon smoos 3/8 9 mm-22

Product contents: The set contains 12 hex heads with a 3/8 inch opening. These heads will fit perfectly with any wrench of the same opening. All the heads in this box come in metric measurements (millimeters). This 12-piece set includes heads in the following sizes: 9, 10, 11, 12, 13, 15, 16, 17, 18, 20, 21, and 22 millimeters. The long heads are made of high-quality chrome vanadium steel. Additionally, the heads are coated with an oxidized black appearance. Thanks to these features, the 12 heads in this set will last a long time without showing signs of corrosion easily. The meticulous finishes facilitate the use of the long heads, as they will fit precisely with the nuts and bolts you want to loosen or tighten.