The shelf support pin is made of high-quality stainless steel, and the hexagonal wrench is made of plated iron, which is stable and not easy to break. It is safe and reliable, with high hardness, strong toughness, and good working performance, allowing you to use it with confidence for a long time. Put the hexagonal wrench into the socket on the top of the spring hinge, rotate the wrench see hole, and then install the metal pin, and then test the door closing rate, repeat the test until the door closes and locks without banging; the replacement process is simple and takes no time. The spring hinge tension pin replacement kit is suitable for repairing and replacing self-closing door hinges, garage door hinges, kitchens, bathrooms, toilets, shopping malls, schools, offices, business buildings and other places. Closed door hinges, whether your hinge pin is broken or aged, can cope with it. The spring hinge tension pin can correctly replace the broken 3.5-inch, 4-inch and 4.5-inch pins. The hexagonal wrench head adopts a flat head design, the wrench body is smooth and comfortable, and it adopts a 90-degree bending process. It not rebound to save your and strength. It fits the socket on the top of the door hinge. You get 12 pieces of stainless steel shelf pins and 2 pieces of hexagonal wrenches, sufficient quantity and complete combination to make repair and replacement work easier, you can also share with others or store some at ; Each metal pin is about 0.7 x 0.08 inches, and the hexagonal wrench is about 2.6 x 0.9 inches, the size is suitable for efficient and easy use, Weight: 0.04629707502 pounds, Manufacturer: puhae