This is a brand new 16-piece combination spanner set from Amtech, model K0550. It is manufactured from high-quality chrome vanadium steel, which is fully drop forged, hardened, and tempered for maximum durability. The spanners feature a mirror polish finish and non-slip cushion grip sleeves for enhanced comfort and ease of use. The set includes the following metric sizes: 6, 8, 10, 12, 13, 14, 15, 17, 18, 19, 21, 22, 24, 27, 30, and 32mm. The set comes complete with a convenient storage wallet.