Cutters, arbor, (2) extra pilots, center punchheavy duty spotweld cutter set includes 5/16″, 3/8″, 7/16″, 1/2″, 9/16″, 5/8″ and 3/4″ cutters constructed from precision ground, premium grade m2 h.s.s. for a long lifealso includes arbor assembly, extra pilot, center punch, hex wrench and washersremoves spot welds on high strength body panelspackaged in a casewe’ve packaged our most popular sizes of all blair holemaking tools in handy kits making them easy to find in your toolbox. plus, these kits will extend the life of your blair holemaking tools because they protect the sharp edges from being damaged by other items in your toolbox. because blair hole cutters are sharp, the kits help protect your fingers, too.the kits are all designed to provide you with the right sizes of hole cutters that are needed to accomplish specific tasks. tasks such as fabrication, rustproofing, installing antennas, removing spotwelds, and making access holes for a variety of aftermarket add ons.