Made of premium chrome vanadium steel, Drop-Forged for long lifespan, Heat Treated for maximum strength and Chrome Plated for rust-resistance, our double box end wrench is pretty anti-abrasive and durable. The double 12-point box-ends and the offset handles help you access to nuts and bolts in narrow places, making your work more effortless. Box end geometry is designed to grip flat sides of fastener heads, not corners, to prevent round-off. [Storage Pouch]: The metric wrench set comes with a rolling pouch for easy organization and convenient storage. Make nice gifts for father, uncle, friends & co-workers. [Metric Size]: 8 pieces high quality offset wrench set : Metric 6 x 7mm, 8 x 9mm, 10 x 11mm, 12 x 13mm, 14 x 15mm, 16 x 17mm, 18 x 19mm, 20 x 22mm.