On Monday, October 15, 2012 9:08:25 PM UTC-5, Frank Whiteley wrote:

AFAIK, there are only four different Cobra trailer key patterns.

I just bought one of each not long ago. Proved useful at the Worlds, as one team had lost their keys, and just happened to wander over and ask if I had a set they could try out. Not much of an investment, and can be quite handy when someone inevitably comes to the field without their keys.

Steve