A Variable Opening Reducer (VOR) for chipping excess fibers on a piece of wood periphery is described, the VOR comprising an infeed portion for securing and moving the piece of wood, along a longitudinal log axis thereof, inside the VOR, a chipping portion disposed sequentially after the infeed portion for receiving therein the piece of wood and for chipping and removing peripheral sections of the piece of wood, the chipping portion comprising a plurality of cutting tools, each of the cutting tools being adapted to revolve about a rotation axis thereof that is substantially perpendicularly located in respect of the longitudinal log axis of the log, each of the cutting tools being radially located in a position interfering with the piece of wood periphery to chip and remove excess fibers and an outfeed portion, disposed after the chipping portion, for receiving, securing and moving the piece of wood along the longitudinal log axis thereof A kit and a method of use thereof are also presented in the present application.