An insertion tool uses a stylet wire to help guide an electrode system into a
cochlea. The insertion tool includes three main elements or parts: a handle, a
guide and a slider. The handle is made from light stainless steel tube flattened
in front with a machined slot. The guide consists of a plurality of metal tubes,
fixed to each other within a holding bracket. In one embodiment, the slider includes
a stabilizer wire, a long stylet wire, and a short stylet wire. During the assembly
process, the stabilizer and stylet wires are inserted into respective tubes of
the guide and the end of the stabilizer wire is bent to form an offset. The electrode
system is loaded onto the tool by inserting the short stylet wire into a holder
that supports the electrode lead.