This is Hexacopter Frame which employs 6 arms to get into the air. There are several advantages of a hexacopter frame over a quadcopter one, justifying the extra price tag.
 
For 6 arms, of course, there are more motors with a hexacopter meaning more power, meaning bigger batteries. This increase in batteries leads to an increase in flight time, which is also nice. Due to these extra motors, a hexacopter is also more stable than your quadcopter equivalent.
 
Another great advantage of using hexacopters is if for any reason your quadcopter loses a motor, it goes down but with a hexacopter, on the other hand, in the majority of cases you will be able to land safely with one or maybe even two motors down; an extra inbuilt guarantee on your beloved copter.
 
This F550 Hexa-Copter Frame is made from Glass Fiber which makes it tough and durable. They have the arms of ultra-durable Polyamide-Nylon which are the stronger molded arms having a very good thickness so no more arm breakage at the motor mounts on a hard landing. The arms have support ridges on them, which improves stability and provides faster forward flight.
 
The arms of the frame are colored as 2-red, 2-white, and 2-black which can guide you to fly in the right direction. The design allows the whole take-off weight to be controlled at about 1200-2400 gm.