Scope: Nail Clippers, Files & Manicure Tools; Nail Drills, Nail Lamps & Nail Dryers (supplies > personal > nail_tools) — six product types (clipper, file/buffer, cuticle tool, e-file drill, UV/LED lamp, fan dryer) bundled under one leaf; split by type.

Seed: equivalent of steel_hardness/toughness is drill_motor_speed_range (RPM): higher RPM strips acrylic/gel faster but costs margin for error on natural nail and heat. A rock climber (failure modes, what certification tested) would notice no brand spec page states a third-party electrical/UV-safety certification for these high-RPM rotary tools or skin-facing UV lamps — the category runs on brand self-description, not a tested standard.

Sources:
[wikipedia_manicure] https://en.wikipedia.org/wiki/Manicure — manicure = filing + cuticle pusher/nippers + clipping — fetched excerpt: "pushing and clipping (with a cuticle pusher and cuticle nippers) any nonliving tissue at the cuticle"
[wikipedia_pedicure] https://en.wikipedia.org/wiki/Pedicure — pumice/callus care is part of pedicure — fetched excerpt: "calluses on the sole can result in..."
[wikipedia_artificial_nails] https://en.wikipedia.org/wiki/Artificial_nails — gel/Gel-X cured under UV light; dip powder removed by drill/clip/buff; TPO restricted — fetched excerpt: "cured using a[10] UV light" / "drill, clip off or buff out layers" / "EU... have prohibited the use of TPO"
[wikipedia_nail_polish] https://en.wikipedia.org/wiki/Nail_polish — gel cures via photoinitiator + UV/LED; regular topcoat is solvent quick-dry — fetched excerpt: "cured under an ultraviolet lamp or ultraviolet LED"
[wikipedia_nail_clipper] https://en.wikipedia.org/wiki/Nail_clipper — compound-lever vs pliers; convex=toenail, concave=fingernail; steel — fetched excerpt: "Two common varieties are the pliers type and the compound lever type"
[wikipedia_nail_file] https://en.wikipedia.org/wiki/Nail_file — emery/ceramic/glass/crystal/metal types; glass resists splintering; emery less abrasive/slower — fetched excerpt: "Glass nail files... do not splinter the nail like emery boards or metal nail files"
[wikipedia_sandpaper] https://en.wikipedia.org/wiki/Sandpaper — grit number: low=coarse, high=fine (40 coarse to 600 fine) — fetched excerpt: "grit sizes (40 (coarse), 80, 150, 240, 600 (fine))"
[wikipedia_rotary_tool] https://en.wikipedia.org/wiki/Rotary_tool — bits held in a collet for concentricity at high RPM — fetched excerpt: "cutter is usually held in a collet... provides the concentricity needed for high-RPM use"
[melodysusie_sc320g] https://www.melodysusie.com/products/sc320g-desktop-multifunctional-rechargeable-nail-drill-30000rpm — 0-30,000 RPM dial, 30 speeds, forward/reverse, cordless rechargeable; site also filters "Corded" — fetched excerpt: "customize the rotation speed from 0 to 30,000 RPM... forward/reverse rotation"
[makartt_drills_collection] https://makartt.com/collections/nail-drills — catalog RPM 20,000-35,000 (one 60W/35,000RPM model); sanding bands/bits in 80/120/180/240 grit, 3/32in shank; bit sets split "for removing gel" vs "for cuticle cleaner" — fetched excerpt: product JSON listing handles "35000rpm", "30000rpm", "5-in-1-tungsten-carbide-nail-drill-bit-3-32", "80-120-180-240-grit"
[makartt_lamps_collection] https://makartt.com/collections/makartt-nail-lamps — lamp lineup 6W mini to 36W full-size — fetched excerpt: handles "6w-mini-uv-led-nail-lamp-portable-foldable", "36w-uv-led-nail-lamp"
[makartt_lamp_product] https://makartt.com/products/uv-nail-lamp-41mw-cm-18-led-auto-sensor-4-timers — auto sensor + 4 timer presets, 41mW/cm², 18 LED — fetched excerpt: title "UV Nail Lamp 41mW/cm² – 18 LED, Auto Sensor, 4 Timers"
[melodysusie_lamp] https://www.melodysusie.com/products/p-plus20f-uv-protection-rechargeable-uv-led-nail-lamp — zoned lighting to reduce direct UV skin exposure; lineup includes 6W-54W models — fetched excerpt: "Innovative zoned lighting technology effectively prevents direct UV exposure to your hand skin"

Branches:
tool_category(manual) -> manual_tool_type: manual tools are judged by blade/abrasive geometry, not motor specs — supported by wikipedia_nail_clipper + wikipedia_nail_file.
tool_category(powered) -> powered_tool_type: powered tools are judged by motor/light specs, not blade geometry — supported by melodysusie_sc320g + makartt_lamp_product.
manual_tool_type(clipper/file_or_buffer/cuticle_tool) -> each routes to its own facet set — supported by wikipedia_nail_clipper (clipper), wikipedia_nail_file (file), wikipedia_manicure (cuticle tool).
powered_tool_type(electric_drill/uv_led_lamp/fan_dryer) -> each routes to its own facet set — supported by makartt_drills_collection (drill), makartt_lamp_product (lamp), wikipedia_nail_polish (dryer vs lamp mechanism split).

Noise (spec-sheet rows seen, left out):
- Battery capacity (mAh) / charge time/port type on drills — listing convenience spec, not an expert differentiator; covered implicitly by drill_power_source.
- LED display / one-button control branding on drills — marketing feature, not a comparison axis.
- Exact irradiance (mW/cm²) and LED count on lamps — not standardized across brands enough to set a sourced range; kept qualitative (lamp_sensor, lamp_timer_mode) instead.
- "320 torque" spec on SC320G — no unit given on the page, could not confirm meaning; dropped rather than invent a unit.
- Price, color/finish, package bundle size — never facets per rule; price explicitly excluded.
- Brushless vs brushed motor claim (one Makartt model) — too thin a sample across the catalog to generalize into a facet.

Corrections: validate.py flagged wikipedia_pedicure as an uncited reference; added it to drill_primary_use's evidence (pedicure_callus_care value) since it supports that value directly.

Corrections (2026-10-26):
- Added `bit_material_or_type` facet (carbide/diamond/sanding_band_mandrel/other) under electric_drill, cited to makartt_drills_collection's named bit SKUs (Diamond Barrel/Tapered, Carbide, Sanding Bands) and wikipedia_rotary_tool's mandrel/arbor description; added it to the three branches' makes_irrelevant lists where it doesn't apply.
- Reclassified `drill_bit_shank_size` from `source: listing` to `researched`; also found and added melodysusie_sc320g's own text "Compatible with all 3/32\" drill bits" as a direct second citation for the number.
- Added `blade_material` to the `file_or_buffer` branch's `makes_irrelevant` list in `manual_tool_type`.
- Re-fetched melodysusie.com/collections/nail-lamps (new reference melodysusie_lamps_collection) to properly source the sitewide 6-54W span; melodysusie_lamp's supports line now only claims its own 54W product fact.
- Added a vocabulary entry for "CCFL".
- Re-fetched melodysusie.com/collections/nail-drills (new reference melodysusie_drills_collection): its real PC90G/PC100GR pen-drill listings genuinely state 20,000 RPM, so the low end of `drill_motor_speed_range` is now cited there instead of to the unrelated cross-sell thumbnail on the SC320G page. Also re-fetched makartt.com/collections/nail-drills fresh and found it only shows 30,000/35,000 RPM products (no 20,000), so its supports line was corrected to match, and `file_grit`'s bin edges were moved from an invented 100 to the documented 120 (Makartt's real grits sold are 80/120/180/240).