The J. Pechauer weight bolt system has been the same for over 30 years. The bolts are color coded so as soon as the bumper is removed you know at a glance which weight screw is in the cue. These are sold PER bolt.

J. Pechauer has switched to a stackable weight bolt system. While the colors for each weight remains the same, the heads of the bolts will be different than it appears in the picture above.