Stainless Steel Allen Wrench

stainless steel
(Stainless steels) Steels that are corrosion and heat resistant and contain a minimum of 10% to 12% chromium. Other alloying elements are often present.
steel containing chromium that makes it resistant to corrosion
A form of steel containing chromium, resistant to tarnishing and rust
In metallurgy stainless steel, also known as inox steel or inox from French "inoxydable", is defined as a steel alloy with a minimum of 10.5 or 11% chromium content by mass. Stainless steel does not stain, corrode, or rust as easily as ordinary steel, but it is not stain-proof.

allen wrench
An L-shaped metal bar with a hexagonal head at each end, used to turn bolts and screws having hexagonal sockets
a wrench for Allen screws
A hex key (also known by various synonyms) is a tool of hexagonal cross-section used to drive bolts and screws that have a hexagonal socket in the head (internal-wrenching hexagon drive).
A hex head wrench