Drill [top left]
Chaco Anasazi
Site number, 29SJ 627
AD 950-1100
Petrified wood. L 4.6, W 1.5, T 0.4 cm
Chaco Culture National Historical Park, CHCU 29891

Drill [bottom left]
Chaco Anasazi
Site number, 29SJ 627.
AD 1075-1125
Petrified wood. L 3.0, W 1.2, T 0.4 cm
Chaco Culture National Historical Park, CHCU 29878

Drill [right]
Chaco Anasazi
Site number, 29SJ 628
AD 750-800
Chert. L 2.8, W 0.8, T 0.8 cm
Chaco Culture National Historical Park, CHCU 14612