Related Clues:

• Flight fleet
• They're at their best when boring
• If they're boring, they're doing their job
• Shoemakers' tools
• Shop piercers
• American inventory
• Cobbler's supply
• Hole punchers
• Leatherworking tools
• Sharp punches
• Smooths, in a way
• Hole-making tools
• Airport sights
• Shoemaker's set
• They do the hole job