ISO 10889-4:2016 specifies dimensions, designations and complementary technical delivery conditions for tool holders with a rectangular axial seat of types C1 to C4 with cylindrical shank in accordance with ISO 10889‑1.

ISO 10889-4:2016 is applicable to tool holders with cylindrical shank for machine tools with non-rotating tools, preferably for turning machines.

For non-standardized tool holders with rectangular axial seat, such as the tool holders shown in Figures 1 to 4, it is advisable to apply the corresponding specifications of this part of ISO 10889.