Blade for reciprocating saw and reciprocating saw

A blade for a reciprocating saw, comprising:

• an elongated body configured so that one end in a length direction of the body is detachably attachable to the reciprocating saw;
• and
• at least one hard tip having a greater hardness than the body and being bonded to the body,
• wherein:
• the body includes a cutting edge part having a plurality of teeth arranged along the length direction and a back part extending along the length direction on the side opposite to the cutting edge part in a width direction, which is orthogonal to the length direction;
• the cutting edge part includes at least one curved part;
• the curved part(s) (each) include(s) at least a first tooth and a second tooth;
• in the width direction, a first distance between a tip of the first tooth and the back part differs from a second distance between a tip of the second tooth and the back part;
• and
• the at least one hard tip is bonded to at least one of the plurality of teeth.