The HyFlex EDM GPF 15/.03 is a flexible glide path file recommended for preparation of highly curved canals to ensure optimal shaping. Even S-shaped canals can be prepared safely and competently with the 15/.03. The dentist subsequently enlarges with the HyFlex EDM Glidepath file size 10/.05 and the HyFlex EDM Preparation file 20/.05. Depending on the initial situation and personal preferences, the 25/.12 orifice opener can be used beforehand as an option.