Snap-off double-edged razor blade

A double-edged razor blade, comprising:

• a first unit blade having a first cutting edge;
• a second unit blade having a second cutting edge;
• a first connecting portion connecting one side of the first unit blade with one side of the second unit blade;
• a second connecting portion connecting the other side of the first unit blade with the other side of the second unit blade;
• a pair of first notches forming a boundary between the first unit blade and the first and the second connecting portions, and guiding breakage of the first unit blade, wherein a direction along which each notch of the pair of first notches extends forms an acute angle with a direction along which the first cutting edge extends;
• and
• a pair of second notches forming a boundary between the second unit blade and the first and the second connecting portions, guiding breakage of the second unit blade, wherein a direction along which each notch of the pair of second notches extends forms an acute angle with a direction along which the second cutting edge extends.