Martin Yale 1040B 13/32" Punch Head For use with 1340B & 1340PB Master 1000 Series Adjustable 40-Sheet 3-Hole Paper Punch, Dimensions 2.75"H x 0.875"W x 3.4375"D For use with 1340B & 1340PB Master 1000 Series Adjustable 40-Sheet 3-Hole Paper Punch Dimensions 2.75"H x 0.875"W x 3.4375"D