Sora提示词：Vertical 9:16, 4K ultra-HD,

Vertical 9:16, 4K ultra-HD, realistic smartphone footage, no subtitles, no flicker, multi-shot montage editing.
All step drill bits must keep exact real-world proportions and shapes, strictly matching the reference product. No deformation or exaggeration.

Shot 1 (0–1.5s)
Quick intro: the step drill bit set displayed inside the case. Slow push-in, engraved size markings clearly visible.

Shot 2 (1.5–3s
Cut to an American home garage. A white American male 30–40s installs the step drill bit onto a power drill.

Shot 3 (3–4.5s)
Close-up drilling: the step drill bit contacts a metal sheet and drills smoothly, expanding the hole step by step.

Shot 4 (4.5–6s
Macro shot: metal shavings curling naturally as the engraved steps advance.

Shot 5 (6–7.5s)
Fast cut: the same bit drilling into a wooden board, smooth and effortless.

Shot 6 (7.5–9s
Finished hole close-up: clean edges, no burrs, stable focus.

Shot 7 9–11s
Tabletop montage: all five step drill bits neatly arranged, even lighting, no deformation.

Shot 8 11–12s
Ending shot: bits placed back into the case, lid closes, brief hold.

Fast-paced but stable editing, highlighting efficiency, smoothness, and professional use.