SIMPLE V-BLOCKS

Here is a set of simple v-blocks in 3 different sizes very handy for drilling holes in round objects.

The hole in the middle is for clearance when the drill breaks through.

The screen capture pictures shows a sample of use
If you place the block on its end you can drill down the axis of your job also.
You still need to centre pop the position of the hole as the drill will wonder on the curved surface.