Full USB drive wipe on Windows 8.1 Pro?

My USB drive is partitioned into 2gb and a 56gb partitions. Does anyone know how I can do a full usb drive wipe, without purchasing any software?

These two partitions are the unexpected aftermath of using this usb as a bootdrive to fix my other PC.
Update: Never mind, I was able to wipe it, delete the partitions, and reformat it with the command line.
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