Included in the delivery scope: You will receive 20 M4 x 10mm knurled thumb screws with threaded design that can be installed in any required position for daily use and easy replacement. The thumb screw features a plastic knob that is comfortable to grip and allows for tool-free installation. Robust and durable material: Our thumb screws and round heads are made of high-quality carbon steel, offering high strength, corrosion resistance, and long-term stability. The round head is constructed from durable plastic, providing a comfortable feel and protecting internal components. These screws are designed for extended use. Additionally, the plastic round head serves as an insulator when used in electronic devices. Wide application: These precision-crafted thumb screws combine functionality and aesthetics. They are suitable for use in mechanical equipment, electronic devices, communication systems, hardware, furniture assembly, and other industrial applications. Simply tighten by hand—no tools required. We recommend verifying dimensions prior to installation to ensure compatibility. Warm reminder: When installing certain monitor parts, consider using a sp to prevent damage to the screen. The screw length is 10 millimeters. Depending on the monitor model, a shorter screw or single layer may be sufficient to avoid direct contact. Color: Black Material: Plastic Package Contents: 20 x Screw Knobs Note: Light reflection and display settings may cause slight variations between the product color shown and the actual item. Measurement tolerances may vary by +/- 1–3 cm.