Reamer n. : One who, or that which, reams; specifically, an instrument with cutting or scraping edges, used, with a twisting motion, for enlarging a round hole, as the bore of a cannon, etc.

Example:
Recommend a quality pair of lexan scissors and body Reamer for RC?

Taxonomy
reamer, hole, Adjustable hand reamer, hand reamer, diameter, reaming, spiral, cutting edges, workpiece, precision, shank, reamed, pin, Flood, morse taper, ream, drilling, hole geometry.

Defination from the web:
reamer or ream is a tool used in machining to make existing holes dimensionally more accurate and to improve surface finish. ... For example, a tapered hand reamer with a clockwise spiral will tend to self feed as it is used, possibly leading to a wedging action and consequent breakage. ...