Unibit


 

Brand name Unibit, there are several generic versions of this stepped size drill bit from other manufacturers. They’re frequently used in sheet metal work, as they are self starting (make their own pilot hole) and one can stop drilling at any number of sizes without having to change bits. I don’t think it’s possible to tell if this was an actual Unibit or generic.

Appearances: Episode 709

Initial update: 1 August 2011