My hammer is a HUGE variation on the original theme...The 1/2" plate is welded to the 8" I beam section. Look here: http://www.pmsknives.com/tourtools.html Disregard the square tubing as that is not in the equation any longer. The hammer head will be boxed out w/3 pieces of 1/2" plate w/UHMW bearing materail attached to them. Mark