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.