Feature: Off-centred cross section design Two point cutting make high efficiency cuttingTwo point cutting make files ahve more space to remove debrisThe device reduces direct contact with the root canal wall, protect the device from locking in the root canal Unique snakelike "swaggering" movement It make root canal more safe apply to minimally invasive therapy,tinyS-shaped curved root canal Prevent the device from locking andreduce the risk of file-broken The advantages of two-point:The device reduces direct contact withthe root canal wall. preventing the device from locking in the root canal 1 flaring file, 1 Path file 1pc 04/17, 1pc 04/23, 1pc 04/30.