The body ot fixed Diameter Hole Opener made of tough
heat treated alloy steel for maximum strength Cutter arms
equipped with removable cutter, are hard faced and
welded on body. Cutters are available in three types: type
SM for soft to medium formation, type MH for medium to
hard formation and type XH for hard formation. The hole
openers have three or six jet tubes with replaceable
nozzles, so that jet streams quickly clean the enlarged hole.