Wilson Jones 381 Line Heavy-Duty Locking D-Ring View Binder, 1.5-Inch Capacity, 8.5 x 11 Inch Sheet Size, Black (W38171) 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