The blade is sharp and retracts making it safe. The problem is that it's so difficult to keep the blade extended to cut that the pressure causes the device to move and end up with a crooked cut. The product description also states that it comes with a self-healing mat. The "mat" is 2" x 3" which makes it unusable as well as the fact that it won't be cut resistant like a blade if dropped directly on the table below.
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