Very stupid. I bought a bunch of these as adaptors for charging my batteries. Why on earth would you solder 2 male bullet leads on one end? I guess I should have read the description, but who solders connectors this way? It's a standard, even on the larger 4mm connectors that one is male and one is female. I had to waste time to punch out the negative lead and solder on the correct female lead. Agh, waste of time.