Review on Superior Performance Uxcell Reduced Shank Twist Drill Cutting Tools - Enhanced Precision and Efficiency by Phillip Johnson

Luckily this drill was used for a one off repair when the hole in the plastic needed to be enlarged to 1 inch. The alloy used is questionable (I'm a candidate metallurgist). In an airtight plastic container, it rusted in my house in less than 7 days. The temperature was 65-80F and the relative humidity was 70%. If you're looking for something that will last for years, try something different.