Wilson Jones 384 Line Heavy-Duty Locking D-Ring 5" Binder 8.5 x 11" Sheet Capacity - Dark Blue (W384-50BLC) Enhanced durability! Heavy duty vinyl covers resist tearing and cracking over time. Locking No-Gap D-Rings always stay aligned to keep papers from falling out. Exclusive, easy-to-load D-Ring straight post design on these 4" binders eliminates the need to bend papers around a curve to load. Pocket Guard on both inside covers holds loose papers secure in their pockets. Label Holder sleeve on spine provides quick and easy identification of contents.