A drag bit is a drill bit usually designed for use in soft formations such as sand, clay, or some soft rock. However, they will not work well in coarse gravel or hard rock formations. Uses include drilling water wells, mining, geothermal, environmental and exploration drilling.
Sizes available are between 4” to 15”
Going up in ½” increments.
4 ½” / 5” / 5 ½” / 6” for example