damaging weapons and vital components. Their pushing power may also be used to shove their opponent into arena hazards. Rammers (AKA 'Bricks') typically have four or six wheels for traction and stability and are often designed to be fully operational when inverted. Because modern rulesets require all robots to have a moving weapon, modern rammers are equipped with other weapon types. Robot Wars Series 6 champion Tornado and Series 7 runner-up Storm II were effective rammers. Wedge – Similar in concept to a rammer, the wedge uses a low-clearance inclined wedge or scoop to move in under an opponent and break its contact with the arena floor – decreasing its mobility and rendering it easy to push off into a wall or hazard. The wedge is also useful in deflecting attacks by other robots. Small wedge-lets are used to lift an opposing bot and feed it to a secondary weapon system. A small wedge may be attached to the rear of a robot with other weaponry for use as a 'backup' in case the main weapon fails. Like rammers, modern wedges must be combined with some other weapon in order to be legal. The lower the degree of inclination of the wedge, the higher the chances of lifting the opponent bot from the ground. The 1995 US Robot Wars middleweight champion La Machine was an early and effective wedge design as was Robot Wars Series 1 champion, Roadblock (1997), and the deceptively simple 2018 BattleBots competitor DUCK! Saw Blades – A popular weapon in the early years of robotic combat, these robots use a dedicated motor to power either a modified chainsaw or circular saw, or a custom-built cutting disc, usually at high speeds (up to 10,000 rpm). The serrated blade is used to slice through an opponent's armor to try and reach its internal components. These weapons can create spectacular showers of sparks, and are easy to combine with other designs, but can be ineffective against robots with tougher armor. The aforementioned Robot Wars champion Roadblock had a rear-mounted circular saw in addition to its wedge, while Series 4 runner-up Pussycat had a custom cutting disc with four serrated blades. Vertical Disc/Bar - A vertical disc or bar spinner consists of a circular disc or flat bar mounted on the horizontal axis. It spins considerably slower and is larger and thicker than most saw blades. The disc has teeth