The cutdown device consisted of a line of nichrome powered off the device controller. The nichrome strand was approximately 3" long and was attached to the cutdown circuitry using metal binding posts. The cutdown line fed down from the balloon passed through one I-bolt and then tied off to another I-bolt. The line running between the 2 I-bolts gave us some space to wrap the nichrome around. Passing current through the nichrome produced plenty of heat to cut the gorilla string we used.