Professional quality screwdrivers on a revolving base.
Set of 10 Screwdrivers sizes 0.8mm - 1.6mm.
These include spare blades that have individual containers in the base.
These are unique that I know of on eBay, they are Chromium-Vanadium steel, this is the strongest steel produced, the ends are ultra-hard for long-lasting top quality screwdrivers for watch repair.
What is vanadium alloy steel?
Chromium-vanadium steel (symbol Cr-V or CrV; 6000-series SAE steel grades) is a group of steel alloys incorporating carbon (0.50%), manganese (0.70-0.90%), silicon (0.30%), chromium (0.80-1.10%), and vanadium (0.18%). Some forms can be used as high-speed steel. Chromium and vanadium both make the steel more.
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