This toolkit is used to install the Schatten HFN-S2 Selmer/Macaferri Guitar Pickup on a guitar that has the smaller soundhole (petite-bouche).
The tool kit consists of one tool that is angled and articulated to allow you to install the pickup through the sound hole and a second tool that enables you to pull the endpin jack or endpin jack preamp into place through the end block. Complete instructions for using this 2 piece tool kit can be seen on the pdf installation instruction sheet for either the Schatten HFN-S2 or the HFN-S2-Artist.