The toothy side of the hacksaw blade does two things - makes a monster-huge spark and really rips up your Magfire, cutting it's useful life in half. But then again, if you use a Magfire to light a fire in an emergency, maybe you don't care if it will last the rest of the decade.

One other thing that the toothy side of the hacksaw blade does besides make a huge spark is it makes a WIDE spray of sparks, which isn't always the best thing.

The best - by far - striker I'v ever used on a Magfire is the BACK of a utility knife blade. Makes a steady, controlled and effective spark.