per the link I posted yesterday, they also sell socket tip handles as well, they might be compatible with the TEKNO bits:
https://www.amazon.com/Drivers-driver-Helicopter-Socket-Screwdrivers/dp/B07G7X1HHD
FWIW.... I only use the 5.5mm and 7.0mm socket bits, never seen any other need for a...
Amazon sells cheap sets with throw away bits that you can replace easily with quality bits later:
https://www.amazon.com/OFNMY-Driver-Metric-Helicopter-driver/dp/B07FDTQ8LQ