✨STAINLESS STEEL- Crafted from high-quality stainless steel. Designed to withstand the rigors of daily use, they provide exceptional strength and endurance, perfect for heavy doors.They feature an additional protective coating and promise a remarkable service life spanning over 10 years with over 50,000 cycles. ✨SILENT AND SMOOTH OPERATION - our door hinge boasts lubricated ball bearing bearings, resilience against frequent use, even with heavy doors. Experience enduring durability, ultra-quiet functionality, and effortless door maneuverability. Bid farewell to annoying creaks and embrace effortless door openness. ✨4 x 4 INCH - 4 x 4 inches, Thickness: 3 mm, Opening angle: 315° Three hinges can bear about 400 pounds (Door width: <37in, door height: <90in). Finish: Stainless Steel Brushed. Since these hinges are much thicker than others hinges, the space between the door and the frame needs to be >0.57 in. ✨REMOVABLE PINS - The pin can remove. Exterior door hinge pins are easily removable to flip the hinge to make it work for both left and right hand doors. Each set includes 3 hinges and necessary screws for straightforward installation. ✨【NOTE】If you are replacing your old hinges, please make sure the screws hole are with the same style! Before purchasing, please ensure adequate RESERVED SPACE and check the HOLE PATTERN to avoid any compatibility issues that may prevent the door from closing smoothly. STAINLESS STEEL- Crafted from high-quality stainless steel. Designed to withstand the rigors of daily use, they provide exceptional strength and endurance, perfect for heavy doors.They feature an additional protective coating and promise a remarkable service life spanning over 10 years with over 50,000 cycles.