This ultra heavy-duty push block has been specifically designed with the cabinetmaker in mind. With a fully adjustable handle position, adjustable material catch stops, and super grip pad, this push block is great anywhere in the shop, especially on large pieces.  The push block allows the work to be held in three directions, down, sideways and forward in order to improve control of the workpiece.  7-1/2″ x 4″ base. Includes two 9″ extension arms and 1-7/8″ high catch stops to give you a 3/4″ deep capture of the material. Stay safe!

More info and instructions here.