Elenco Mechanical Science Screws Set

Learn how worm gears are used to greatly lower rotational speed and how screws can convert circular to linear motion while greatly increasing force. Build 5 working models, a screw press, a folding lifting platform, 2 cranes and a vice. A 36 page activity book is included with innovative experiments and detailed explanation of the different technological principles applied! Booklet with detailed building instructions also included. .Ages 6 and up.