For CAD Users
You can model a bracket in Fusion. You have, five times this month. StreamSolid ships the parametric version so your CAD hours go to the parts only you can design.
Nobody got into CAD to fillet the walls of another project box. The interesting part is the cutouts, the mechanism, the thing only you know how to make. The rest is trench work that has to be done correctly and gives you nothing back.
Worth your hours
Not worth your hours
A downloaded STL is a dead end the moment your case is slightly different. That's why every model is parametric underneath, and Custom Size hands you those parameters directly: set what the job needs and the exact part is built to order.
Bring the base part into your assembly instead of starting from a sketch on a blank plane.
Drive the two or three high-level parameters that describe your case. The tolerances and clearances underneath are already solved.
Bring the mesh into your slicer or your CAD, cut into it, and build on top of it. Personal use is covered by default; Pro adds a commercial license.
Custom Size is included with StreamSolid Pro on every model. A one-time model unlock lets you make that model in any size you need.
Designing for print is its own discipline: wall thickness, overhang angles, layer orientation, and the clearance that makes a press fit a press fit instead of a paperweight. It's the work most free catalogs never did, which is why so much of what you download prints badly.
Support-free by design
Overhangs kept within printable angles rather than propped up after the fact.
Oriented before you get it
Layer direction chosen for strength along the axis the part is actually loaded.
Sizes, not scaling
Each size is regenerated from the model, so clearances stay correct instead of scaling with the part.
Every model has one, no account needed. Print it, measure it, and decide whether the rest is worth your evening.