The Northwest's slowest robot - Scuttle is a 24lb walking hexapod ring spinner. It uses 12 20kg servos (two per leg) to crawl about, and is invertible. The weapon ring is 1/4" thick steel, weighs 12lbs (with teeth), and can reach 1500 rpm.   Watch an In-depth "how it works" video ...   or a Short walking demo video .