Self-tapping threaded inserts in brass, type Ensat 309. Specific for use on wood, both hard and soft, soft plastic and composite materials
They are installed by screwing them into the hole with a special installation tool
These self-tapping inserts are suitable where it is necessary to have threads with high wear resistance on materials that are not very resistant. On hard wood and plastic material it is recommended to insert with the cutting edge facing downwards, while in soft woods the cutting edge can be kept facing upwards
DIN 7965
 
On request these inserts are also available in Steel, Stainless steel, AISI 316