Ample quantity: you receive 40 pieces 6 mm x 10 mm threaded knurled thumbscrews, which can be installed in any place you need, and meet your daily use and replacement Quality material: the male thread knurled clamping knobs are made of quality carbon steel, with good hardness, strength, resistance and wear resistance; It is a fastening accessory that can be applied for a long time and could be reusable for most different purposes Nice craftsmanship: the of the grip thumb screw on type round head is smooth, the thread is neat and uniform, without burrs, making the installation effect more tight Easy to install: the grip knob thumb screw adopts a screw-in design, which is easy to install; The is smooth and clean, making you feel more comfortable to hold and store Warm notice: it is recommended that you need washers as gaskets when installing some monitors to prevent affect to the computer monitor; The length of the screw part is 10 mm, which may bottom out on some computer monitors; You just need a layer of buffer to prevent direct contact in some cases Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Photo Color Material:Carbon Steel Package Contents: 40 x threaded knurled thumbscrews(6 mm x 10 mm) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.