Direct Burial Copper Ground Connector, 4 to 14 AWG, Lay-In Lug
https://nsiindustries.com/product/direct-burial-copper-ground-connector-4-to-14-awg-lay-in-lug/
Polaris grounding and bonding products provide flexible solutions for a wide range of grounding and bonding applications in the field. Use copper ground connectors for grounding or continuous loop bonding of copper wire in direct burial applications.