Scrod's right. A good hacksaw cut ain't that tough. Try running some masking or electrical tape around the bar as a guide if you have trouble sighting a straight, square cut. If it's your first time, do a practice cut an inch out from where you want your final cut. Then if you find you're not up to the task at hand you can take it to someone to do the final cuts for you or consider the pipe cutter route.

A flat file on the end to smooth it out, flat file around the outside to get burrs and a rat's tail file to knock down the burrs on the inside.