They're firechux, the weights are wraps of kevlar wick for setting on fire. End weighted chucks pull the momentum outward and keep aerials and contact moves balanced - if you're not used to them I recommend getting some tapered wood or graphite to get used to the feel.
i usually just stick with my favs i have graphite hollow centers covered in foam so i dont kill myself and i use front set areals so i dont really have to worry about the balance of it because i roll them off my hand to build it up into a throw so they stay where they should most of the time :]
Who is Levi, lol, i can do some of those under leg aerial but if i try to do under the arm or under the shoulder downwards throws, i hit my head all the time or the nunchuck goes back somewhere, any suggesstion or tips ^_^?
ur chux are so weird lookin and they look like if i used them the weighted ends would kill me lol... im used to middle weighted chux not end... lol good tutorial also :]