Razorsharp was Raelene Sharp, a metahuman hacker and member of the Psyba-Rats and the Blood Pack. Eventually, Rae and the Blood Pack were incinerated by Superboy-Prime during the Infinite Crisis, but she was "resurrected" as a member of the Black Lantern Corps during the events of Blackest Night. Raelene can change her hands into large razor metal blades.
In the New 52, a new version of the character was introduced, renamed as Haley. She was a high school student who worked as a mechanic and like many residents of her town, she was infected with a sickness that was giving everyone "octane capabilities". Instead of morphing her limbs into metal blades, her powers revolve around a limited form of ferrokinesis.
Razorsharp was created by Chuck Dixon and Kieron Dwyer, first appearing in Robin Annual (Volume 2) #2. (1993)