$10 for a four pack. This amazing little magnet orients North/South so that the cardinal directions can be easily determined (look through the side with the countersunk hole to find North). There are no moving parts to break and it can't be rendered inoperable from being magnetized. It's not only perfect for survival kits, but the hole allows it to be used as a button or strung though bootlaces, drawstrings, and other out of the way locations. Hang the magnet from a thin string so it can orient unhindered. That all there is to it.
PLEASE NOTE: These magnets are VERY POWERFUL! Do not let them slam together or they could break. Also, a large group of them can erase hard drives, cell phones, and other electronic storage devices if they come in direct contact. Please take these precautions into account when using or separating these magnets. BCNW is not responsible for any data loss or breakage.