About this 3D model

Worm Gear. and 24 Tooth "Tree Top" Gears. Lego Technic compatible. ( Don't know what else to call them.) These are 2 of the full kit over at http://www.badbrick.com "Like US" https://www.facebook.com/badbrick In our 3D catalog under Gears. Didn't want to double post a bunch of gears.