De Neers - 8 mm, Single Open End Spanner has only end shaped like the jaws of a spanner. The 8 mm, Single Open End Spanner has a black phosphate layer over the core vanadium chromium steel. The Single Open End Spanner is for fasteners of size 8mm. The jaws are machined to precisely fit the 8 mm fasteners without causing any deformation. The Open End Spanner has raised collars on the open end of the spanner. The black phosphate layer of the spanner improves the surface friction and the corrosion resistance of the material.
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