Barcode: 763477003348
The FR-5.2G has a one inch base to fit a wrench or bench vise. Thin wall construction allows use without removal of cones and locknuts. The FR-5.2G has 12 splines that are approximately 23.4mm across.
Made swapping my SRAM cassette a breeze from old to new wheelset
Worked just fine. Centering pin seems to help stability, but I have not used any other to compare.