Professional tool for commercial or occasional use Metric combination spanner Manufactured from chrome vanadium steel for strength and durability Combination spanner so one end open and the other is a ring spanner Metric spanner 12 sided bi - hex ring spanner so perfect for a bit more rounded off nuts as grips the nut / bolt a lot more substantially 15mm spanner Fully polished for rust and corrosion resistance Total length of the spanner 190mm / 19cm