Energy blade: A retracting blade with replaceable blades made use of for various cutting tasks
https://www.evernote.com/shard/s419/sh/c3c6ca49-52fe-68ae-20ae-8b6e9d46675c/wIivw5fa1QgBs72NKdJjz5arFsu0Hb26NvZZlFMbOlk9a09TN72FLka7HQ
Utility blade: A retracting knife with changeable blades made use of for numerous cutting tasks, from opening boxes to accuracy job