Tool reference CAD
Downloaded engineering models checked locally in FreeCAD. Each source is pinned to a revision, with its license and intended use recorded. These models help check tool shape and access; physical fit still needs a first print.

| Tool | Geometry | Use and confidence | Files | Credit |
|---|---|---|---|---|
| 2 mm hex key | Native STEP, one valid solid | Generic short key. Checked against HX01 with a short lift-and-pull route. | Source and history · STEP | shreekumar3d / jigita · repository AGPL-3.0 |
| 3 mm hex key | Native STEP, one valid solid | Generic short key. Checked against HX01 with a short lift-and-pull route. | Source and history · STEP | shreekumar3d / jigita · repository AGPL-3.0 |
| 4 mm hex key | Native STEP, one valid solid | Generic short key. Checked against HX01 with a short lift-and-pull route. | Source and history · STEP | shreekumar3d / jigita · repository AGPL-3.0 |
| Digital caliper | Native FreeCAD and STEP; STEP imports as 30 valid solids | Community engineering model. Imported bounds: 305 × 14.5 × 77.5 mm. Exact tool identity and physical fit remain unverified. | STEP source · FreeCAD source | hasecilu / FreeCAD-library · CC BY 3.0 |
Hex-key sizing
The nine long-key envelopes in HX01 use published dimensions for 1.5–10 mm EGA Master keys. The generated reference has hexagonal shanks and a swept elbow with an assumed bend radius. The three downloaded short-key models provide an independent shape check. EGA Master dimensional table.
Tape-measure and cable coverage
The tape dock uses a conservative 92 × 48 mm case-plus-clip envelope. Several product listings mix case dimensions with retail packaging, so coverage is stated by envelope. The coil hanger uses a user-arranged bundle envelope. Their gray viewer shapes show those clearance assumptions.