For sale is a California Tool, Solid Carbide Center Drill, No. CT-9066.  The drill is new and unused and comes in the original plastic tube.  I would call this a step drill if the tube wasn't labeled Center Drill.  I measure the tip diameter as 0.271" and the shank as 0.3125".  i have several of these drills available so if you buy more than one, a discount is applied and shipping is reduced on the additional units.  The drill(s) will be shipped promptly form Missouri.  Thanks for looking.