You need a diamond tipped bit to drill almost any rock.
drillability is the relative speed at a which rock may be penetrated by a drill bit
It's on the left side of the rock and a bit down
metal drill bit has a finer point
A titanium or cobalt drill bit.
Diamond is harder than any other mineral. A diamond bit can drill through any rock.
The precise shape and angles of a drill bit.
A tungsten coated drill bit.
You need a diamond tipped drill bit to drill glass or tile.
That is a drill bit designed to remove partial drill bits that have broken in a hole
You attach a drill bit into the chuck of the drilling machine.
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