Feature: Made of high quality materials, anti-rust, anti-rust and durable to use. Fine workmanship, smooth surface and wide application. The thread pattern is neat and clear, and the strength is even, and it is not easy to insert the wire. Smooth hole position without burrs, no pain to hands. Widely used for mechanical appliances, large appliances, household tools and so on. Specifications:Item Type: Plum Hand Tighten Nuts Material: Carbon Steel + BakeliteColor: Black Quantity: 4pcsSize: As Pictures ShowPackage Included:4/8pcs Knob NutNote:Transition: 1cm=10mm=0.39inch Please allow 0-1cm error due to manual measurement. Pls make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!