Legal
Privacy
The short version: this site runs in your browser, and the numbers you type into a calculator or a 3D tool never leave it.
What is collected
Nothing is collected by default. The site has no analytics, no advertising and no third-party tracking scripts. There is no account and no login.
Calculators and 3D tools
Every calculator and every 3D simulator runs entirely in your browser. The measurements you enter and the models you build stay on your device. The 3D library is downloaded from this site, not from a third-party content network, and nothing about your model is transmitted.
Local storage
The 3D tools store one preference in your browser session: whether you have chosen to load the 3D model on a small screen. It is a single flag, it is not shared, and clearing your browser data removes it.
The contact form
The contact form is validated in your browser before it is submitted, and the site is a static reference with no server-side storage. If you prefer, use the email address in the footer instead.
External links
Some pages link out to community discussions. Those links carry rel="nofollow noopener" and open in a new tab. Once you follow one, the destination site’s own privacy policy applies.