And understanding of each Working Tool of the Blue Lodge of Masonry. Here's a complete list of the Blue Lodge Working Tools included: 1. The twenty-four-inch gauge. 2. The common gavel. 3. The chisel. 4. The square. 5. The level. 6. The plumb rule. 7. The skirret. 8. The pencil. 9. The compass. 10. The trowel. ".