It is also called loop holder. It is used to transfer bacteria form culture to a petri dish.

To transfer bacteria, first disinfect the loop by heating it in a flame until till glows and then, allow it to cool down or the bacterial will die upon contact. After cool down, transfer bacteria from culture to a petri dish.

To assemble, simply loosen the screw at the end of the plastic handle and insert the other end of the nichrome loop and tighten the screw.