I recently bought a Snap on Drill bit index Thunderbit Cobalt pretty cheap (thats how I roll). It is missing some bits, I mainly bought for the index, can anyone recommend some good twist drills to fill the empty slots. I would like Cobalt Splits. Yes I know I can get them from Snap on Website, but it doesn't bother me a bit that they all wouldn't be Snap on. Who makes drill bits for Snap on anyway?