De Neers - 15 mm, Single Open End Spanner contains a jaw ideal for working on the hexagonal fastener measuring 15mm across flats. These 15 mm, Single Open End Spanners are german type engineers' spanners with raised collars on the open ends. The Single Open End Spanner constitutes high-grade chrome vanadium steel. The company uses forging techniques for the Open End Spanner, which enhance the properties of the steel beautifully. The spanner has a high value for tensile and compressive strength. The outermost layer is the black phosphates. The core material is oxidation and corrosion-resistant. The ordinary abrasives have little to no effect on the spanner surface.
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