Material of Door Hinges and Screw, 201 Stainless Steel, Brushes Polish
Size: 4" x 4", Thickness: 2.9 mm, Load 66 lb. for three hinges
Max 10N spring tension, 305 degree max rotation angle, self closing door design and adjustable spring. Included 201 stainless steel screw and allen wrench which can adjust the spring tension with clockwise rotation hinges' axie
3 Pcs Self closing door hinges, using for door that thickness is above 3cm