These tools offer a fast method to enlarge and existing hole or to improve the finish after trepanning.  They offer the economy of fitting in the standard trepan head – no special tooling.

The 10 degree reamer, also called wipers are very useful to clean out after a tip breaks.  Many problems arise when a tip breaks and carbide is embedded in the material being drilled.  These 10 degree reamers wipe the area clean so a fresh start can occur without work hardening the area.