PACKAGING: There are a total of 50 hex nuts in one set that you can use for many projects. GREAT QUALITY: These insert nuts are made of high quality zinc alloy, high hardness and long service life. EASY TO USE: They are simple to use and convenient to connect aluminum profiles to other parts NOTE: The pre-drilled hole should be as deep as the length of the insert nut and any part of the bolt that can be screwed past the end of the nut into the workpiece. AFTER-SALES GUARANTEE: Tanus is the only seller authorized by Hilitand brand. We care about every customer's feeling. If this product does not meet or exceed your expectations, please contact us first, we will solve the problem immediately. Specification: Item Type: Hex Nut Material: Zinc Alloy Quantity: 50pcs Optional Size: M6*15 Package List: 50pcs x Hex Nuts (with flange cover) Delivery quantity: 50 pieces Product color: Colored zinc Product size: M6 * 15 Note: Manual measurement, please allow 1 - 3cm error!!!Yeuri