Description: Premium quality #45 steel material, special heat treatment, high hardness, durable and good toughness. Precision spanner wrench, great for professionals and hobbyists demanding ease of operation and high quality work results. A great auxiliary tool for nut or bolt, widely used for vehicle repair, machinery repair, home appliances maintenance etc. Hardness, wearproof, and durable, perfect for equipment installation, debugging, maintain and overhaul working. Easy to operate, 8 sizes for you choose, practical and convenient for use. Specification: Material: Steel Size(approx.): Length: 24mm: 168mm/ 6.6inch. 27mm: 171mm/ 6.73inch 30mm: 192mm/ 7.56inch 32mm: 195mm/ 7.67inch 34mm: 208mm/ 8.18inch 36mm: 208mm/ 8.18inch 38mm: 210mm/ 8.26inch 41mm: 231mm/ 9.1inch Color: Black Package Includes: 1 Piece Open-End Wrench Note: Please allow 1-3mm error due to manual measurement, pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item, pls understand, thank you