General description US PRO SPANNER SET is a comprehensive 12-piece combination spanner set designed for versatility and durability. Made from high-quality chrome vanadium (CR-V) steel, this set includes a range of sizes suitable for various applications, ensuring you have the right tool for the job. Technical specifications Material: Chrome Vanadium (CR-V) steel Sizes included: 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm