Multi-Sided Buffers (Blocks/Sticks): These typically feature 4 to 7 sides, with each side labeled or color-coded for a specific step (e.g., filing, buffing, smoothing, and polishing for a glossy finish). They are lightweight, travel-friendly, and ideal for beginners.Electric Power Files: Battery-operated or rechargeable devices that come with multiple snap-on attachments to shape the nail, push cuticles, and buff the surface. Some kits include built-in nail dryers.