2 Prong to 3 Prong Grounded Outlet Converter Adapter with Polarized Plug – White | 4 Pack

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Perfect for when your tool or appliance has 3 prongs, but your older home or worksite only has 2 prong outlets.
Connect the grounding clamp with the wall plate screw to secure in place and to make the socket grounded, or simply use as an adapter.