The SOG Fusion Contractor 2x4 model FF-01 was built with builders and carpenters in mind. This knife has a 3 inch 440A stainless blade that comes razor sharp right out of the box. The sheepsfoot blade comes in handy for making fine cuts or exact cut marks. The handle has a built in level for a quick measurement when you're up on the ladder. At the end of the handle is a pencil sharpener that will keep you from having to make a walk back to the tool box. The SOG FF-01 is one very thoughtful tool when it comes to carpentry.