A machine for manual action that releases, shreds or defrays the different fibers of meat for human consumption, be it chicken, beef, pork or any other suitable animals that have fibers. These are characterized by having a bar of different shapes located on the periphery of a shaft which has a handle for manual action so that when the operator turns the handle, bars that are located linearly and equidistant on an axis rotate so that the meat pieces located in the tray enter through an opening and collide between the bars inside the casing. The rotating and fixed bars swivel between said bars and rods, allowing the bars to rotate without colliding or crossing. Through this movement, the pieces of meat are shredded or defrayed in different sizes, depending on the distance and speed between the linear bars moving and those that are fixed. Note the system may also work with either reduction gears and or a reduction motor. This shredder may be attached to the table via a vise or similar mechanism.