Ade Advanced Optics Heat Treated Steel Starter Punch Tool Hollow end roll pin punch set helps to prevent damage caused by an accidental slip off while getting the pin started Use our hollow end punches to align and start the pin then finish driving it home with an impact punch The 4 you need for most Applications:7/32, 3/16, 5/32 and 1/8 Made of heat treated steel Hollow roll pin starters in factory pouch