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You may have cut yourself when using a cutter with a ruler. Or, if you slow down the sweep of the blade for the sake of safety, the edge often misses the straight line and goes sideways.
Safety Cutter is a cutter that moves its edge along the narrow groove inside a ruler. The stainless steel belt connected over the edge is surrounding the ruler. When pushing on the belt, the edge appears through the groove. When the edge goes blunt, separate the ruler to replace it. You can use Safety Cutter as a safe, regular ruler.
Samsung Art & Design Institute (sadi)
Seoul, South Korea
Hwang, Won Chul
Gyeonggi-do, South Korea