The tool specification "DIN 4980 - 2020 D P 3" provides the following information:

DIN - 4980 = ISO 6 = SMS 117 (see catalog)

2020 = 20 mm by 20 mm square support

D = right-handed / E = left-handed

P - 30 = Class and Hardness

To determine a tool’s configuration, place the tool in front of you with the hard metal down. If the cutting side is to the right, the tool has a right-handed configuration. Consequently, if the cutting side is to the left, the configuration is left-handed.