Emeici are a traditional Chinese martial arts weapon. They are a pair of metal rods with sharp ends used for stab

Stab

STAB or stab can mean:*The act of stabbing with a sharp instrument*Stab, a short form of stab jacket, another word for buoyancy compensator*Stab vest, a type of armour designed to resist knife attacks...

bing; they are typically mounted on a detachable ring worn on the middle finger, allowing them to spin and be elaborately manipulated.

These weapons originated at Mount Emei (hence the name). They are a piece of equipment used in wu shu

Wushu (sport)

The sport of wushu is both an exhibition and a full-contact sport derived from traditional Chinese martial arts. It was created in the People's Republic of China after 1949, in an attempt to nationalize the practice of traditional Chinese martial arts...

to this day.

These weapons are used for 'open palm' techniques, and are similar to 'judges pens'.

The general idea of this weapon is to confuse attacker by spinning the blades thereby distracting in order to get close enough to stab. Also, emeici can be concealed easily for surprise attacks.