Reliable and approved grounding clamps are characterised by high clamping forces. They penetrate through the existing insulating layers such as dirt, paint and grease. This establishes an effective metal-to-metal connection and guarantees secure grounding.
The best grounding clamp is useless if it's not available at the right moment. Unfortunately grounding clamps and associated cables are often abused for other purposes in practice, and are then no longer available for their actual task. Therefore, regularly check whether your employees have access to intact grounding rollers, brackets and cables.