The Fingertech AR500 is a nasty piece of work. Mount horizontally for a classic spinner, or go vertical to give your opponent nightmares! All electronics and mounting hardware is included. 
 
Viper Vertical Spinner kit includes
Material: AR500 Abrasion-Resistant Steel
Length: 13.97cm tip-to-tip
Blade Thickness: 3.3mm
Screws: x4 mounting screws with matching allen key
Safety: Fingertech weapon lock
 
Specifications
Weight: 191gm including electronics
Voltage: 7.4V - 11.1V
 
Responsibility
It is dangerous to add a weapon to a robot. Never power up the robot outside of a specifically built test-box or arena. Always use the provided safety lock and follow proper activation procedure. All screws have been threadlocked and should not be removed. Wear and tear is anticipated, however the kit should be returned in working condition. This weapon kit needs to be returned immediately following the final tourament. To maximise the lifespan of this kit -
disable the weapon if it becomes jammed,
do not disassemble the weapon, and
use only within a test-box or combat arena.