Designed with a flame-shaped boring head with a non-cutting guide tip on a slender shaft. Used to reduce the curvature in the orifice of the canal, allowing greater access to the canal for cleaning and obturation.

Instrument size can be easily identified by the number of grooves on each instrument.

In addition to the standard 32mm length, 28mm and 38mm lengths are available depending on whether for molar or canine use, etc.