Are they older model hios torque drivers hanging off the spring balances? I can’t quite make out the power supply unit.
Did you buy or build the plier / screwdriver holder (wooden one, not the wera precision one)
The torque drivers are DLV 7540-MKE with DLC 4510-JE supply and DLV 7331-CKG with DLC 1213-GG supply. Both with the 1/4'' hex bit receptacle instead of those 4 mm half-round / shank ones, because I already have a gazillion fitting bits.
Bought both of these used on eBay a while ago, for 80 € and 55 € delivered. They seem well used and needed some cleaning, but other than that they work like a charm. No worn out bushings or bearings.
At around the same time I could score a lot of five NOS Hahn & Kolb Autostat 7212-01 balancers - basically for the price of one.
The tool holder for the pliers and screw drivers is made from routed plywood parts (6mm). They are around 10 € from some model making shop, but if you happen to have a CNC router or want to DIY cut some by hand with a scroll saw, just drop me a PM and I will send you a DXF.