This part of ISO 13399 specifies a concept for the design of cutting items, limited to regular inserts, with the usage of the related properties and domains of values.This part of ISO 13399 specifies a common way of designing simplified models that contain the following:— definitions and identification of the design features of regular inserts, with a link to the properties used;— definitions and identification of the internal structure of the 3D model that represents features and properties of regular inserts.The following are outside the scope of this part of ISO 13399:— applications where these standard data can be stored or referenced;— creation and exchange of simplified 3D models for cutting tools;— creation and exchange of simplified 3D models for tool items;— creation and exchange of simplified 3D models for other cutting items not described in this part of ISO 13399;— creation and exchange of simplified 3D models for adaptive items;— creation and exchange of simplified 3D models for assembly items and auxiliary items.