Transparent Background Photo Cleanup

I have up to five product shots that need their existing backgrounds completely removed and replaced with full transparency. The final files must be crisp around every edge—no visible halos or leftover artifacts—so please use precise selection tools in Photoshop (Pen Tool, Select-and-Mask, etc.) rather than quick automated cuts.

Deliverables:
• High-resolution PNGs with transparent backgrounds
• The layered PSDs, if you work non-destructively, so I can make future tweaks

Please keep the original resolution intact; compression or downsizing isn’t necessary. If you have a portfolio that showcases clean extractions on complex edges, feel free to share it when you respond.