Wilson Jones Heavy-Duty Locking D-Ring 1 1/2 Inch Capacity White View Binder (38170) Locking D-Ring holds 40% more than standard round rings. Easy to insert customized spine labels - EasySpine(TM) insert sleeve keeps spine from ripping or folding. No-Gap(TM) locking D-rings feature stays aligned to keep pages from falling out. Create professional looking presentations quickly and easily