Tools to remove HeliCoil Inserts are available for ranges M1.6, M2 – M2.2, 2.5 - 4.5mm, 3 - 8,. 5 - 10mm, 10 - 3/8", 11 - 24mm, 7/16" - 1", 27 - 39mm, 1-1/8" - 1-1/2". Extraction is done by applying the tool to the insert, striking the head of the tool a light blow and turning it counterclockwise, maintaining steady downward pressure.