surface is incorporated into a squeeze point for squeezers application_number US 59751800 A description before explaining the present invention in detail it is important to understand that the invention is not limited in its application to the details of the construction illustrated and the steps described herein the invention is capable of other embodiments and of being practiced or carried out in a variety of ways it is to be understood that the phraseology and terminology employed herein is for the purpose of description and not of limitation while the following discussion is directed toward instruction for performing physical training the invention is not limited to this particular application the invention provides a method and apparatus for spreading a rivet having application in the fastening of sheet metal in diverse fields such as aviation construction and fabrication in a first embodiment of the inventive precision bucking bar 10 as shown in fig2 and 4 the inventive apparatus comprises a unitary rigid structure 12 having at least one bucking surface 14 thereon as used herein a bucking surface is a flat hard surface intended to squarely interface the shank end of a rivet during a spreading operation the bucking surface of the inventive device has first side wall 16 and second side wall 18 such that the bucking surface resembles a slot located at one end of the bucking bar 10 referring to fig3 and 4 in operation the bucking surface 14 is placed against the shank end of rivet 20 placed through a hole 22 which has been.