[del schisler]

My old bits are taking longer and longer to grind through much of anything. Thought I'd treat myself to a new set. Rockler has a surprisingly limited selection.

Sears offers:

• Craftsman Cobalt
• Craftsman Black Oxide
• Craftsman Titanium Coated
• DeWalt "Pilot Point" "High Speed Steel"
• Craftsman Titanium
• DeWalt "Pilot Point" Cobalt

and a good bit more.

Home Depot:

• DeWalt Titanium
• Ryobi Titanium
• Ryobi Black Oxide

Don't know what Cobalt or Black Oxide are (or any of the others, really). Is Titanium better than Titanium-coated? Can anybody rank materials or recommend a brand?

Thanks.

do a google search for the hardest drill bit's and read, lot's of info their