Features 【Hexagon head design】: The screw-in insert nut has external thread and hex socket drive, and its hex head design is suitable for all types of hex wrenches and electric drills. 【High Quality Material】: These insert nuts are made of galvanized carbon steel with high hardness, rust-proof, corrosion-resistant, sturdy and wear-resistant, and have a long service life. 【12 Different Sizes】: There are 12 different sizes of insert nuts in total, each size contains 20, you can choose according to your project to meet your basic needs. 【Easy to Install】: Insert nuts are easier to install than barrel nuts and T-nuts because they can be installed from one side of the workpiece. (The depth of the pre-drilled hole must be as deep as the length of the insert nut plus any part that may be screwed past the end of the work nut). 【Application】: Insert nut kits are ideal for hardwoods, such as sturdy woods, and have good results in advanced furniture combinations. Can be widely used in wardrobes, cabinets, shoe cabinets, bookcases, etc. Description: An insert nut provides a threaded socket for a wooden workpiece, similar to a wall anchor. These insert nuts are inserted into a pre-drilled hole by screw in, in that case the external protrusions bite into the wood, preventing the nut from either turning or pulling out. Features: 1.The screw-in insert nut has external thread and hex socket drive, and its hex head design is suitable for all types of hex wrenches and electric drills. 2.These insert nuts are made of galvanized carbon steel with high hardness, rust-proof, corrosion-resistant, sturdy and wear-resistant, and have a long service life. 3.There are 12 different sizes of insert nuts in total, each size contains 20, you can choose according to your project to meet your basic needs. 4.Insert nuts are easier to install than barrel nuts and T-nuts because they can be installed from one side of the workpiece. (The depth of the pre-drilled hole must be as deep as the length of the insert nut plus any part that may be screwed past the end of the work nut). 5.sturdy woods, and have good results in advanced furniture combinations. Can be widely used in wardrobes, cabinets, shoe cabinets, bookcases, etc. Specifications: Material: Zinc plated carbon steel Type: Hex socket screw-in Thread Type (pitch): Coarse thread Size and Quantity(Optional):  M6*10mm   20pcs M6*13mm   20pcs M6*15mm   20pcs M6*17mm   20pcs M6*20mm   20pcs M6*25mm   20pcs M8*13mm   20pcs M8*15mm   20pcs M8*17mm   20pcs M8*20mm   20pcs M8*25mm   20pcs M10*25mm  20pcs Package Includes: 20pcs Insert Nuts Package List