Brass knuckles, roll of nickles, bic lighter or any thing else you hold while beating the shit out of someone using your fist.

A Batarang is a roughly bat-shaped throwing weapon used by the DC Comics superhero Batman. The name is a portmanteau of bat and boomerang, and was originally spelled baterang. Although they are named after boomerangs, batarangs have become more like shuriken in recent interpretations. Batman has unerring accuracy with a batarang -- he never misses. They have since become a staple of Batman's arsenal, appearing in every major Batman television and movie adaptation to date. Recent interpretations of the Dark Knight finds additional motivation to use the batarang as a ranged attack alternative to firearms, which he rejects outright due to the circumstances of his parents' murder.
Batgirl also uses batarangs. Nightwing, a former Robin, is known to use his own modified batarangs1 called Wing-Dings, which are styled after a bird. Tim Drake, the third Robin, also possesses his own 'R'-shaped shuriken. In an issue of Teen Titans (Vol. 3), Drake claims that he hid the costs for shipping a Batmobile from Gotham City to San Francisco in "the batarang budget", which he tells the others is "bigger than you might think". The current version of Batwoman, who was introduced in the 52 continuity, uses a miniature batarang. Catman also uses weapons inspired by Batman's and calls them "catarangs". Like Robin, Anarky, an occasional antagonist of Batman, also makes use of shuriken formed after his own gimmick, the "circle-a".

A Throwing Bird