The schedule explicitly separates new numerically controlled (N/C) routers into 8465920055, while non-N/C new routers are split by value: under $3,000 each (8465920051) and $3,000 or over (8465920058). A router qualifies as numerically controlled if its axes of motion are directed by encoded numerical data — typically CNC control. Importers should retain the manufacturer's control-system documentation to substantiate the N/C classification if questioned by CBP.

Both moulders and shapers cut profiles into wood, but they are assigned distinct 10-digit lines: moulders (new) fall under 8465920031, while shapers and profilers (new) are covered by 8465920061 (with value splits at 8465920062 and 8465920066). The key distinction is mechanical: moulders typically feed the workpiece through rotating cutterheads on a horizontal spindle, while shapers use a vertical spindle. Manufacturer product descriptions and technical specs are the primary evidence for classification.