Included in the delivery scope: You will receive 20 M4 x 10mm knurled thumb screws with threaded design, suitable for installation in various positions for daily use and easy replacement. The thumb screw features a plastic handle that is easy to grip and simple to install.Robust and Durable Material: Our thumb screws and round heads are made of high-quality carbon steel, offering high strength, corrosion resistance, and reliable performance. The round head is constructed from plastic, providing a comfortable feel and helping protect internal components for extended use. Additionally, the plastic round head can act as an insulator when used in electronic devices.Wide Application: These thumb screws are precisely crafted, functional, and practical. They are widely used in mechanical equipment, electronic devices, communication instruments, hardware, furniture assembly, and other related fields, adding convenience to everyday applications. Simply tighten the screw as needed. We recommend measuring the required dimensions before installation to prevent errors due to incorrect sizing.Warm Reminder: When installing parts such as monitor panels, we recommend using a spacer to avoid damaging the screen. The screw length is 10 millimeters. For certain computer monitors, a shorter screw or additional spacing may be necessary to prevent direct contact.Color: Black Material: Plastic Package Contents: 20 x Screw Knobs Note: Light reflection and differences in display screens may cause slight variations between the color shown in the image and the actual product. Measurement may vary by +/- 1-3 cm.