Historical clue formulations

• Hole-boring tool — 2025-03-30
• Boring bit — 2023-12-27
• Tool for boring holes — 2022-08-22
• Boring tool — 2021-09-05
• Helical bit — 2020-12-06
• It's boring — 2019-03-01
• Drilling tool — 2017-01-09
• Boring tool — 2013-06-25
• Boring tool — 2011-02-23
• A boring person might have one — 2009-08-08
• Hole-making tool — 2008-07-22
• Boring bit — 2007-01-14
• Tool with a cross handle — 2004-08-17
• Boring article — 2004-01-04
• Boring tool — 2000-01-04
• Kind of bit — 1998-07-05
• Boring tool — 1996-08-07