✕CHOOSE A DIFFERENT TOOL WHEN
- Fine, brittle flash better snapped or scored — that crosses to a razor or scoring tool (see 2b).
- High-volume small-part deflashing — a great many small molded parts with fine flash are deflashed faster by cryogenic tumbling or media blasting than by any hand knife; the 66090 is the large-part, short-run, heavy-flash tool by Hyde's own wording.
- Throughput vent-trimming of production tread rows — that is the five-groove pin trimmer's swath job (65060); the single notch takes the detail after.
- Flat-only bench work where clearance never matters — a straight V-trim (66030 curved-tip, 66330, 66060) is the simpler right answer when the surface is flat and the hand never fouls it.
- And it is not a repair knife — finishing a healthy part is this line; shaving damaged rubber off an injured casing is the K770 skiver (61350) and reaming a ragged casing cut is the H2T taper point (61260), both other lines.