Sk-7 safety cutter with 12 mm semi-automatic retraction blade, when the slider is released, the blade automatically retracts after cutting or when it loses contact with the material to be cut, prevents accidental injuries after cutting, powerful return spring, robust stainless steel blade channel, reversible dual-use blades, suitable for left-handed users: only reverse the direction of the blade, no tools are required to replace the blade, dimensions: 26 x 115 mm