This 3/8" extension aircraft drill bit is a reliable tool for all your drilling needs. With a solid carbide construction and extra length design, it's perfect for metalworking and CNC manufacturing. The 2 flute design ensures precision drilling and the 12" overall length provides the necessary reach for deep drilling applications. The brand of this drill bit is Precorp and it comes in a convenient 2 pack. It's categorized as a machining drill bit and falls under the metalworking supplies category for business and industrial use. Make your drilling tasks easier and more efficient with this high-quality carbide extension drill bit.