The KBDcraft Sachiel Element 85% Layout Wired Mechanical Keyboard takes 3rd-generation modular Lego-compatible design as its core highlight, transforming the classic 85% TKL keyboard into a hands-on creative product. Users can assemble high-quality cybernetic components into an exclusive keyboard, combining practicality with the fun of Lego assembly. This keyboard is equipped with 4 interchangeable functional knobs that support QMK/VIAL customization by default; users can remove the knobs with welding tools and replace them with 6 custom keys to flexibly adapt to diverse workflows, or easily revert to the classic layout. Its innovative 85% Gasket Mount shell design is unique: only the arrow keys and the 6 custom keys (after knob replacement) are compatible with the exclusive DSS125 round keycaps, while standard keys use 1.25 scaled DSS keycaps to achieve seamless connection with the brick shell. Paired with the Gasket Mount structure, both types of keycaps provide smooth feedback and comfortable tactile feel, effectively enhancing operational recognition. Additionally, the keyboard is equipped with premium components (including high-quality switches and stable PCBs), which not only provide solid hardware support for new keymap settings and ensure accurate response, but also deliver clear and mellow key sound to balance operational stability and auditory experience. With Vial software, users can fully customize key mappings, macro commands, lighting effects, and even the functions of knobs and custom keys, simplifying operation processes through personalized settings and significantly improving work and usage efficiency.