Solar Panel Crimper Locator for MC4 Dies | SPL-MC4Description This is the replacement locator for SPC MC4L. This locator is used to hold MC4 connectors in place during crimping, making it quick and easy to crimp solar panel wires onto MC4 connectors. Features Features 2 Holes for holding 2. 5 4 6 and 10 mm MC4 connectors Spring loaded clip design holds connectors in place while crimping Compatible with SPC MC4L and SPC MC4 (4 6 mm MC4 connectors only) solar panel crimpers Lifetime Warranty