Aaki bonding spools are built to handle voltages and currents associated with static electricity. This means that the spool will handle high voltages and very low currents. Grounding applications typically require the device to handle generator voltages (120V to 600V) and currents that may be present during a fault condition (ranging from milliamps to tens or hundreds of amps).
The system design is often fundamentally different. For instance the clamp on a bonding spool is designed to pierce insulating material (such as paint or corrosion). The piercing point has a very small surface area and can’t handle a lot of current. Conversely, clamps for grounding applications often have a large surface area that contacts the grounding pole. This allows the clamp to transfer large currents without overheating.