Beiter - String Separator Tool
Multi-Purpose-Tool for many different tasks, not just for working on your strings.
Sold in pairs because you can and should use it as a pair.
With the Beiter String-Tool you can easily count the strands in your string and properly install your Peep-Sight. After you have pushed the first String-Tool through the string, you can count the single strands by inserting them into the grooves on the Tool.
To be able to install the Peep-Sight easier, you can use the second Beiter String-Tool generating a bigger working-window.