A Spin-Tight Drum Key is highly recommended (and really convenient) when utilizing these rods, but in a pinch a 2mm hex key would do the job.
These specialized tension rods work across the vast majority of drums - anywhere you would use a normal tension rod! A small rubber washer prevents metal-on-metal contact with the hoop.
This item includes four Spin-Tight Tension Rods, as well as the Spin-Tight Drum Key specifically made for them.