4561 - 4-Ply adjustable collarete binder K712NA-B(S124B)-1/2" (44/13 mm) - suitable for Flatbed Type Chain Stitch Machines like: Kansai Special DWK-1802D, 1803D,… Pegasus W61, Union Special 57800, Yamato DV-200, 1200, DW-300, 1300,… With adjustable folding guides for smooth feeding. (equivalent: S124B1/2).