This knob screw is made of high quality 304 stainless steel and has a cleared disc head style. Package contains 10 pcs knob screws, the screw size is M4 x 10mm. The weight is 58g and the total length is 18mm. Silver blue is the main color, head diameter is 10mm. This knob screw is a complete screw type and can be used with VESA monitors. In addition, the knob is 0.5 inch (12 mm) in diameter, making it easy to tighten and handle. Ideal for monitor arm screws and VESA converters. Compatible with keywords such as M4 bolts, thumbscrews, bolts, etc. Use these knob screws to install monitors and other devices easily and securely.