Product Description:Model: Knurled High Step Head Thumb ScrewsMaterial: Aluminum Alloy + 304 Stainless SteelSize : M3 ( could be custom requested size .)Thread length:5mm - 60mmHead thickness: 20mmHead diameter :25mmAvailable colors: Red,BlackUse: Computer, chassis, aspect panel, difficult disk, optical drive, network card, graphics card, sound card, DIY modification, etc.Note:Due to the variations in shooting scenes and technology, there will be a chromatic aberration between the photographs and precise colors.Due to manual measurement, the product length may have small tolerances, please check with the actual product.