Interior door hinges have both a cap on the top and a cap on the bottom - DoItYourself.com Community Forums
MACO - PRODOOR Door hinges
Burglar Proof Stainless Steel Double Pin Anti Theft Security Door Hinge - Buy Stainless Steel Door Hinge,Anti Theft Hinge,Security Door Hinge Product on Alibaba.com
Field gate double strap bottom hinges - Gate Expectations
Hinge Pin Remover and Center Punch Double Head Portable for Door Pin Removal | eBay
4" (102mm) Grade 13 Black Powder Coated Fire Door Hinges - HIN1433P13MB at Simply Door Handles
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Neon butt hinges for upvc double glazing doors by Paddock.