20pcs Computer For Case Shockproof Screws Shockproof Shock Absorption Screws For 3.5-inch Screw Description Computer for Case Shockproof Screws Shockproof Screws + Shock Absorption 3.5-inch Shock Absorption ScrewsHard disk damping screw 3.5 Thick tooth step screw rubber to reduce hard disk fixing screwDesktop 3.5-inch hard disk use, need chassis support,Part of the power supply can also be used, but not the laptopSpecifications:Color:BlackProducts include 20PCS size diameter: 10.30MMThread diameter: 3.4MMUnthreaded polished rod part diameter: 4.53MMTotal length: 11.3MM thickness: 1.47MMPolished rod length: 4.83MMThread length: 5MMPackage Includes:20 PCS Screw