使っている鎌は光る。

to use (a thing, method, etc.); to make use of; to put to use; to use (a person, animal, puppet, etc.); to employ; to handle; to manage; to manipulate; to use (time, money, etc.); to spend; to consume; to use (language); to speak

sickle; sickle-and-chain (weapon); spear with curved cross-blades; gooseneck tenon and mortise joint; noisiness; part of a fish around the gills

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

to shine; to glitter; to be bright