A 4-sided spoke key to suit 3.2mm nipples (the standard for high quality spokes).
This spoke key is similar to the original "Spokey" that developed into the DT spoke key. It fits the same nipple size. There are two significant differences: the Cyclus has a single steel nipple driver insert; the DT has a double insert for better engagement with the nipple. Also, the recess for the spoke on this one is straight whereas on the DT is is flared, making the DT preferable on wheels where there is significant spoke bending from the rim. But this one has a very reasonable price! Weight: 8g.