【Industry-Standard Self-Closing Cam-Rise Hinges】: Heavy-Duty & Adjustable for Smooth Door Operation. Ideal for: Commercial refrigeration, restaurant coolers, industrial freezers, and high-traffic entry doors requiring durable, self-closing hinges. 【Reduces Gasket Wear】: Cam-rise action minimizes seal friction, ensuring long-lasting performance even on uneven floors. Self-Lubricating Nylon Cam: Durable, low-maintenance design provides smooth, quiet door operation without sticking or jamming. 【Wide 130°+ Door Opening】: Holds doors securely open beyond 130° for convenient access in walk-in coolers, freezers, and heavy-duty applications. 【Enhanced Closing Force】: Spring mechanism overcomes air resistance, ensuring reliable sealing on thick or heavy walk-in doors.Reversible for Left/Right Doors: Easily switch hinge direction manually—no extra parts needed for universal compatibility. 【Tool-Free Door Removal】: Lift-off hinges allow quick door detachment without disassembly—ideal for maintenance or space-saving storage.