Horizontal Spinner
Real Life Examples: Son of Whyachi, M.O.E., Hypno-disc
Game Examples: Tornado, Berserker, REVENGE
As the name implies, it is a kind of bot whose weapons spin horizontally.
The most common weapons put on HS's are razor tips, iron spikes, and maces. You might also consider Bear claws.
Pure HS
Pure HS, also called 36-irons, are bots with 36 maces (Absolute Chaos) or irons (Ultimatum). They are a common test of Stock building skill and one of the deadlier HS designs ever.
All of them have 4 times 9 weapons on a tribar on a HP Z-tek. Also you must stack 2 Supervolts on them, and they have 2WD HP Z-tek drive with Shiny Hubs or Slipperbottoms. Most of them are built with 2 SnapperII's, but Sage (the 36 iron pioneer) built several with other things: Just a 2 Servos, or just 1 SnapperII.
Trivia
HS's are very popular into the community now, and certainly the most built.
All builders built at least one, and a respectable amount of members do love them.
The stars include InfiniteInertia's Absolute Chaos, Sage's Ultimatum, Starcore's Tempus fugit (pretty much of a legend into the lightweight division) and Fury (same in the MW division), and ACAMS's Death Warrant (did very well in the Tag Team Tournament partnered with Fury (this team was beaten by Sage and Sorrow)), Abrupt Decision and 2 Sinister (HS/Rammer hybrid).