attached to it to catch opponents and either throw them into the air or rip chunks out of opponents. Bars can have added teeth, but generally do not in the smaller weight classes where they are used most. Discs and bars generally have much larger impacts compared to saw blades. The main advantage of a disc or bar is its ability to throw opponents into the air as well as break off pieces of its opponents. Notable vertical disc spinners include Robot Wars competitor Aftershock (shown on right) and 2020 Battlebots winner Endgame. Notable bar spinners include Deep Six, a relatively unsuccessful Battlebots competitor known for its massive damage output and lack of control. Drum Spinner - Drum spinners consist of a thick, short cylinder with teeth spinning on a horizontal axis. Drum spinners spin with a higher speed than vertical discs or bars, but have less reach. Good drum spinners can land a solid hit almost every time they contact another robot and send it flying as high as a normal vertical disc or bar. Drums are also much thicker, meaning almost the entire front of the robot is taken up by a weapon. Drum spinners have a tendency to suffer from extreme drive issues due to the large amounts of gyroscopic forces. Notable drum spinners include the Battlebots competitor Minotaur and 3 pound robot Lynx, which dominates the 3 pound class to such an extent that it is being retired to give other teams a chance to win. Overhead spinner/Midcutter/Undercutter - Overhead spinners, midcutters, and undercutters are all the same concept and are all horizontal spinners with varying weapon locations. In a overhead spinner, the spinner (usually a bar) is directly overtop the robot, similarly to a full body spinner. Midcutters have a spinner placed about halfway up the robot (usually slightly lower). Undercutters have a spinner low enough almost to scrape the ground. All of these types can use a disc or bar, although bars are usually more effective. Weapons usually spin at a similar speed to verical bars/discs) Advantages of this type of weapon are the large impacts and tendency to throw other robots across the arena floor. Notable robots of this variety are Battlebots competitor Tombstone, which was known to tear all robots, regardless of armor, into pieces and proceed to throw the mangled remains throughout the area. Bloodsport (also a Battlebots competitor) is another