The grab will grip under the head of the rail for lift. The hardened point allows threader to slide under rail, even through ballast and the vertical and horizontal rollers provide low resistance support so the threader can slide along the rail providing lift of the rail on or off the sleeper.
This reduces manual handling and the O H & S issues related to moving heavy rail.
It is recommended that the Rail Threader be used with a Rotating head fitted to the excavator.