Yes, Mike ... that's the style of reamer I use.
However, check the sizes ... the big ones look way bigger than you would ever use on pens.
I bought a set of 7 reamers from Busy Bee Tools in Canada for about $60.00.
The biggest reamer covers the size range 7/16 to 15/32 . (called a size 2A)
The next covers 13/32 to 7/16
Then 3/8 to 13/32
Then 11/32 to 3/8
Then 5/16 to 11/32
Then 9/32 to 5/16
Then 1/4 to 9/32 for the smallest in that set. (Called size 8A)
I also bought a couple of these individually for $20 each as the first ones wore out.
The individual ones came from kbctools.com
I use them a lot and I have found a need on occasion for all of those 7 sizes.
I also bought a 17/32 to 19/32 reamer and that's the biggest I have found a need for.
You can view the set of seven here:
Buy Adjustable Blade Reamer Set Of 7pcs at Busy Bee Tools
I find these reamers very useful for fitting brass tubes to blanks to get a better fit than using the kit manufacturer's recommended drill size which sometimes gives a sloppy fit.