JMT Production

Inward Extrude is a Blender addon that cuts into objects destructively, using the object's own geometry to make the cut. Trigger it with Ctrl+Shift+E in edit mode with one or more faces selected.

Quick Screws is a Blender add-on for adding fully customizable, high quality procedural screws. Built for hard surface design and mechanical prototyping, it ships with 33 heads, two materials and two thread profiles.