<p>Four 3.5mm snap (male) to 2mm pin (male) adapters for Tens / EMS electrode leads.</p> <p>You want this if you have a Tens or EMS unit that has snap style connectors and you want to also use pin style electrode pads.</p> <p>Simply snap the adapters onto the end of your leads. Then insert the pin end of the adapters into the the electrodes.</p> <p>Note: The 2mm pin and 3.5mm snap are the most common sizes of electrode wire connectors on the market. However, you should ensure that you are ordering the correct item in the correct size.</p>