(you can see right thru to the other side)
Do I need this one
Fits all cranks using 22mm x 1 threads and square, tapered bottom bracket spindles. Also fits "Power Spline" cranks from SRAM using the 8mm thread bolt.
OR this one
The 22 x 1 mm fine thread.
For crank bolts larger then 8mm threading. ISIS Drive and Shimano Octalink may use either 12mm or 15mm bolt thread.
I looked more clearly and it looks like I have the octalink... (the ridges around the thread that look like a torx driver)
Mtbr's 2016 Winter Biking GearReviews and Roundups
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Thread: Crank Puller (pics) - Which one?