Handprint provides a collection of tools to prepare Blender models for 3D printing. It includes utilities for STL calibration to handle unit scaling and a gap helper for adjusting mesh intersections and clearances. The toolset features automated object renaming to maintain hierarchy organization.

A major component of the addon is its diagnostic checking suite, which detects non-manifold geometry, floating elements, flipped normals, mesh intersections, gap sizes, and inconsistent wall thickness. Additionally, a real zoom level feature allows users to visualize models at their true physical scale directly in the 3D viewport.