Product description "Datanoise - Mini Protoboard"
Small “breadboard-style” PCB by Datanoise for realizing your own circuit designs.
The Datanoise Mini Protoboard is a compact PCB (85.09 mm x 100.33 mm) with soldering pads for thru-hole components. Besides two power rails, which are known from classic breadboard layouts, there is a third rail for GND or additional voltages. – Very handy when using TLL/CMOS logic chips or other integrated circuits.
The outer soldering points of the Mini Protoboard are conveniently large and not interconnected. – Perfect for attaching control elements such as encoders or potentiometers.