www.thedriller.com/articles/87874-custom-built-hole-opener-line
Custom-built Hole-opener Line
June 1, 2010

Underground Tools Inc. (UTI) has launched a new line of custom-built hole-openers for horizontal directional drilling (HDD) applications. With information regarding the type of rock formation or the PSI of the rock, UTI can build a hole-opener specifically designed for that particular job. It can cut any type of thread connection, and incorporate any type of built-in stabilizer option. These hole-openers are available from 8-inch O.D. to 60-inch O.D.
Underground Tools Inc., Card No. 11