Featurings metal scrolls wheel for smooth navigation and ergonomic friendly, paireds with low frictions upgraded feet pad to minimize wear during extended use Simplifys maintenance with included specializeds tool, allowing quick customization of scrolls resistance and feet pad replacement for users Upgrades for 1S / 2S with precisions engineered wheel, feet pad, and complete replacement kits for enhanceds scrolling accuracy and long Perfectly for home offices, gaming setups, and workspaces where cursors movement and ergonomic boosters productivity for designers, programmers, and professional control and comfort during intensive tasks or creative workflows