Start by removing the locking pin (Photo 1). Then add or release tension until you get the proper close rate (Photo 2). Place the hex wrench into the socket at the top of the spring hinge and turn ...

The pin uses a special spiral spring concept and its combination of strength and flexibility let manufacturers and assemblers of PC-board card locks and ejector clips maximize hinge performance.

Whether it's the front-door lock that won't let you into your own ... This works on the side, top, or bottom. Just lifting the hinge pin and squirting a little oil into the hinge will work for ...

The hinge can swing normally but when positioned just right, the squared-off pin within slots into a tapered track, locking the part in place. Inspired by a handheld shopping basket with a ...

then push the black locking pin and lift the white yoke to release the connector. Next up you have the retaining pins for the hinges. Unbolt these from the hinge's underside with a T50 hex bit.

For doors that swing closed or open on their own, Popular Mechanics recommends bending the hinge pin a bit with a hammer (pictured at top-left in our little matrix picture mash-up): Rather than ...

Stick the shim loosely between the door and the jamb to hold the door in position when you drive out the upper hinge pin. Then bend the pin slightly with a firm whack. Reinsert the pin and check ...

There are two styles of doorstops: one that looks like a stick and gets installed either in the base molding of the door itself and one that is installed in the door’s hinge pin. With the type ...