Ample quantity: you will receive 10 pieces M4 x 10 mm threaded knurled thumbscrews, which can be installed in any place you need, and meet your daily use and replacement needs. Quality material: the threaded knurled clamping knobs are made of carbon steel, offering good hardness, strength, corrosion resistance, and wear resistance; these reusable fastening accessories are suitable for long-term application. Nice craftsmanship: the grip thumb screw features a round head with a smooth surface, neat and uniform threading, and is free of burrs, ensuring a secure and tight installation. Easy to install: the grip knob thumb screw has a screw-in design for easy installation; the smooth and clean surface provides a comfortable grip and ease of handling. Warm notice: washers are recommended as gaskets when installing certain monitors to help prevent damage; the screw length is 10 mm, which may bottom out on some computer monitors; adding a buffer layer can help prevent direct contact in such cases. Material: Carbon steel Color: Black Package Contents: 10 x Thumbscrew Note: The package includes only the items listed above. Light shooting and different displays may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.