Peter, I use a block of cold rolled steel as a bench block, with shallow holes drilled in it for pins.
On the drill press, I use a flipped over machined and ground cast iron V-block (available from Enco in pairs for about $10) with a 1/4" hole drilled near one edge. It is dead flat, and square with the drill bit- I couldn't live without it for drilling holes in knife tangs.
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