TOGU 3 Pack 4BB Stainless Steel 304 Ball Bearing Door Hinge 4-Inch x 3-Inch with 2.5mm Thickness Interior Door Hinges for Residential and Commercial Use,Wooden Doors,Metal Doors,Satin Nickel TOGU smooth operating plain bearing door hinges are all machined from top grade solid die-casting stainless steel 304,anti-rust,durable and strong.2.5mm thick hinges with solid center bearing provides a stable structure to increase carrying capacity and withstand unexpected impact,never worry about bent or break during daily using. With Perfect surface treatment,TOGU door hinges possess corrosion resistant,moisture resistant and ageing resistance feature for bathroom,kitchen or outside using.Passing 72-hour spray test while the industrial standard is 24-hours,our products offer you a pleasing appearance and a longer life span for 8-10 years in normal conditions. Equipped with 4 ball bearings,doors can be opened and closed smoothly,especially for children and the aged,increasing the life span of doors and door hinges.Bearing and leaf of hinge combine with no gap to reduce unnecessary friction and provide mute function when using,no looseness,no deformation. 4"x3" interior door hinge provides larger area of thrust surface,by virtue of 2.5mm thick,it features maximum bearing about 80KG in 3 pieces,available for residential and commercial use,fit for most solid wooden doors and metal doors. Comes with rust-proof self-tapping screws for installation,saving effort finding in the local stores.Screws we provide are constructed from stainless steel,not only much longer and sharper to be mounted on the door and frame easier,but also matching screw holes on the hinge perfectly to avoid felling off after a period of time use.