Fixed, square-wire spring for a grip that will last Refined range to handle all common applications Positive grip shell that is perfect to twist-on with fingers Excellent for fine stranded wire applications Models 71B®, 72B®, and 73B® rated for use in Air Handling Spaces Approved for bonding and grounding applications High-temp models designed to withstand the extreme heat build-up found in high-wattage light fixtures and signs