Description of Eagle Tool ETSHK21 Installer Interchangeable
For use with Heads ETS7501 ETH500, ETM500, and Extension Adaptor ETHXKIT250. Flexible spring steel shank. Non-slip flat (drill end) and Non-slip three flat grip (chuck end). Wire fishing hole in chuck end. Replaceable set screw and allen wrench kit ETAKIT1.
As my tests showed this drill bit barely made a dent in the metal and was completely useless. The only positive thing I can say is that the packaging looked nice. The price is much too high for a product that does not perform as advertised .Don't waste your money on this drill bit..
Pros
Comes with 21 interchangeable tips for versatile use
Cons
Requires initial investment to purchase the tool and tips
These are very easy to remove, my drill bit was pulled about 3 feet into the drywall halfway through a bolt. I ended up cutting out the access panel and drilling through it with a hole saw just to get the bit out. Totally useless unless it pierces through softwood (pine) without removing it.