| Can someone tell me the difference between the type of drill bits,
| i.e. Gold, Cobalt, Titanium, and Black-Oxide.
| Also what does Metal index mean?
A drill index is a small "rack" that holds drill bits. It may be a
hinged box, or it may just be a bar with holes in it. A metal index is
a drill index made out of sheet metal (the alternative is plastic)
with a (typically) hinged lid.
Those aren't really types of drill bits - the adjectives refer to
coatings or finishes applied to drill bits. If the bits are for
woodworking, my recommendation would be to not spend extra for any of
them. If they're for metalworking, I'd suggest asking over in
Types of woodworking bits include spade, Forstner, brad-point,
tapered, and standard twist bits. If you browse a catalog sales web
site (like www.leevalley.com), you can see photos and find a bit about
the attributes of each.
DeSoto, Iowa USA