a slider - zipper assembly in which the slider has a design lending itself to economical manufacture using an injection molding process . the slider comprises a frame that straddles the zipper , a plow supported by the frame and separating respective sections of two interlockable profiled zipper parts , and a plurality of projections that latch under the zipper parts to retain the slider on the zipper . the frame has three bridging members , a first opening disposed between the first and second bridging members , and a second opening disposed between the second and third bridging members , the plow being connected to and depending downward from the second bridging member . first and second retaining projections are disposed entirely under the first opening with no portion of the first and second bridging members overhanging any portion thereof , and third and fourth retaining projections are disposed entirely under the second opening with no portion of the second and third bridging members overhanging any portion thereof .