A drill bit is what actually cuts into the rock when drilling an oil or gas well. Located at the tip of the drillstring, below the drill collar and the drill pipe, the drill bit is a rotating ...

With that in mind, we assigned awards for each product based more on its features rather than on specific metal uses. DIYers ...

Our favorite model was the Drill Doctor 750X because it was easy to use on different drill bit types and sizes, worked fast, ...