The Arrow Development Tools BLKPLA-175-3M is a flexible PCB prototyping board that is compatible with any 0.8mm integrated circuit package. It features a multi-layer design and four mounting holes, allowing for a variety of circuit designs without the use of additional PCB drilling. The board is made of FR-4 material and has a standard 0.8mm grid spacing. It can be used with standard components, including resistors, capacitors, connectors, switches, and integrated circuit packages. The BLKPLA-175-3M also has four mounting hole sizes, allowing for more design flexibility. It is compatible with a range of circuit geometries, and can be used for prototyping and development of IoT, embedded, and automotive applications.