20pcs Carbon Steel Hex Socket Drive Insert Nuts Head Nut Threaded for Wood Furniture, Zinc Plated

EASY TO INSTALL: Insert nuts are advantageous over barrel nuts and T-nuts, because they can be installed from one side of the workpiece HIGH DURABILITY: These insert nuts are made from high quantity zinc plated carbon steel for durability and rust EXTERNAL THREAD: Screw-in insert nuts have an external thread and hex socket drive and are screwed in with a hex key wrench MULTI SIZE: There are screw-in insert nuts in different sizes and take different screw sizes that you can choose for your project NOTE: The pre-drilled hole must be as deep as the length of the insert nut plus any portion of the bolt that may be screwed past the end of the nut in the work piece