This is a Swivel Knife by NT Cutter. The head of the knife can turn 360 degrees and will cut in the direction that the knife is being pulled.
It comes with a safety cap to protect the blade as well as to protect you when the knife is not in use.
It also comes with one packages of 5 blades (30 degrees) and a plastic piece that used to hold the chuck area in place when replacing blades. The blades come in a small plastic case so they are protected.
The knife is designed to help you cut curves easier in one fluid motion.