Simple, but effective.  These small single-pole nipple clips have just enough pressure to be tantalizing, without a lot of pain.  They can be used with or without connecting your power box lead wire to them, your choice. :)  They measure just over 1.5" in length, with the actual clamp being right at 1/2.  When completely open, the jaws are 7/16".  The width is 3/8" at the end.

Not only are these great for nipple play, but can also be used with lead wires on each side of the Labia to run current through the lips and clit for wonderful and erotic sensations. For those guys who might want come extra sensations right under the head or even on the testicles, these little guys will do the trick.

After thinking about other uses for these clamps, you can even use them to connect conductive tubing, conductive strap and urethral inserts.  

When using on the nipples, we recommend another electrode such as a TENS pad, connected to the same lead wire and fixed next to the clamp.  Thus, one clamp and TENS pad to one lead wire from one channel of the power box.  Using one on each nipple connected to one lead is not a wise choice, as it runs current across the chest and could cause heart complications.  Definitely do not use on the chest area if you are wearing a pacemaker of other medical electronic device.

Definitely a must and inexpensive addition to any electro-stimulation toy chest !!