Serrated snap-off utility knife blade

A utility knife blade comprising:

• a first side;
• a second side opposite the first side;
• a back edge;
• a plurality of score lines laterally spaced relative to each other along the blade and defining blade segments therebetween that are breakable at the score lines;
• a cutting edge opposite the back edge, the cutting edge defining a plurality of serrated portions and substantially non-serrated portions located between serrated portions, wherein at least a plurality of the score lines extend from approximately the back edge to the cutting edge and intersect the cutting edge at respective non-serrated portions;
• first and second metal portions, wherein the first metal portion extends between the back edge and the second metal portion and is formed of a steel defining a first hardness, and the second metal portion defines the cutting edge and is formed of a relatively wear-resistant steel defining a second hardness greater than the first hardness;
• and
• a weld region joining the first and second metal portions.

A utility knife blade comprising:

• a first side and a second side opposite the first side;
• a first edge and a second edge opposite the first edge;
• a back edge;
• a cutting edge located on an opposite side of the blade relative to the back edge;
• a plurality of blade segments formed adjacent to each other and extending along at least a substantial portion of a length of the blade;
• a plurality of first means axially spaced relative to each other along the cutting edge;
• a plurality of second means axially spaced relative to each other and intersecting the cutting edge at respective first means for defining the boundaries between adjacent blade segments and for enabling the breaking off and removal of respective blade segments;
• and
• a plurality of third means substantially different than the first means and extending axially along the cutting edge between respective first means for improving at least one of the cutting speed and wear resistance of the cutting edge.