Description: [Material] - T-nuts are made from carbon steel, these nuts have high hardness and a long service life surface is Nickel-plated for good rust resistance and better performance. [Wide application] - T-slot nuts are extensively utilized in aluminum construction, including manufacturing workstations, storage racking, industrial barriers, elevating ladder repairs, and other applications. [Easy installation] - First, insert the Sliding T slot nut head into the groove in the direction of the profile groove. Next, rotate it 90 degrees clockwise to automatically lock it when it is installed. [NOTE] - These nuts are small in size. As such, they should be stored in an inaccessible location for children's safety. Specification: Shape: Hammer Head Material: Carbon Steel Finish: Nickel plated Color: Silver Tone M4 Size: 10x6x4.4 mm / 0.39x0.24x0.17 inch (LxWxT) Package Content: T-nuts: 100Pcs x M4 T Sliding Nuts Hexagonal socket pan head screw: 25Pcs x M4x12 50Pcs x M4x16 25Pcs x M4x20