3 / Set. Replacement disks and punch heads ensure your three-hole punch is working properly. Quality construction drills holes through a thick pile of paper with ease. Strong metal construction holds up under heavy use. Easy-to-install design allows quick replacement for immediate use. Kit includes pins and pads in a blister card. Disks and 9/32" punch heads are designed for use with Business Source High-capacity Three-hole Punch (sold separately).