Wilson Jones Canvas Sectional StoragePost Binder For 8-1/2 X 11 Sheets, 4-1/4" Post Spacing, Green Canvas, W278-27A Expandable data binder with slide button locking mechanism, cover release, canvas covered hinges and imitation leather corners Slide button locking mechanism in slotted metal case permits removal of cover without lifting it over posts Canvas covered hinges for added durability Green canvas covers over medium-weight board and imitation leather corners for a stylish appearance Ideal for filing purchase orders, invoices, shipping and receiving records and other forms requiring frequent sheet changes