This standard BS ISO 243:2014 Turning tools with carbide tips. External tools is classified in these ICS categories:
25.100.10 Turning tools
This International Standard specifies the types and the dimensions of turning tools with carbide tips; it deals only with external tools. It also gives the definition of right-hand and left-hand tools.
The shank sections and the inserts used are selected respectively from those defined in ISO 241 and ISO 242.
NOTE Internal tools are the subject of ISO 514; designation and marking are the subject of ISO 504.