mandrel

Solid carbide, a compound made primarily of carbon and a metal from the transition metals group, is the cornerstone of these drill bits' superior performance. Its composition endows the material with exceptional hardness and wear resistance, making it ideal for drilling through tough materials such as stainless steel, titanium, and other high-strength alloys. Unlike traditional high-speed steel (HSS) drill bits, which can quickly dull and lose their cutting edge, solid carbide drill bits maintain their sharpness over numerous operations, significantly reducing downtime for tool changes and resharpening.

...

Another significant advantage of fiberglass storage tanks is their durability. Unlike metal tanks, which can corrode or rust over time, fiberglass tanks are highly resistant to corrosion and chemical attack Unlike metal tanks, which can corrode or rust over time, fiberglass tanks are highly resistant to corrosion and chemical attack Unlike metal tanks, which can corrode or rust over time, fiberglass tanks are highly resistant to corrosion and chemical attack Unlike metal tanks, which can corrode or rust over time, fiberglass tanks are highly resistant to corrosion and chemical attackfiberglass storage tanks. This makes them ideal for storing aggressive substances that would damage other types of tanks. Additionally, fiberglass tanks are lightweight, which makes them easy to transport and install.

...