1.[365 Days After-Sales Guarantee] is committed to providing the high quality cabinet hardware and excellent customer . We will replace for if any quality issues within 365 days. 2.[Extraordinary Construction]These matte black door hinges are made of high-quality steel, solid and durable, you would be d how it gonna be. The pin is removable and you can beat the nail with a hammer to remove the pin. 3.[No Squeak Ever]Our black door hinges are specifically manufactured with electroplating coatings. They are highly rust resistant and include the damping oil feature which is built to reduce metal-to-metal friction. 4.[Measurement]3-1/2 inch X 3-1/2 inch; Corners: 1/4 inch Radius. Thickness: 22mm. We recommend you to apply 3 hinges for each interior and exterior door. 3 hinges can support 60kg, 133lbs.