●The Hinges are constructed from high quality Stainless Steel,ensuring quality and longevity,sturdy and durable ●4mm-Thick stainless steel Polished Chrome finish will not rust,build to resist daily scratches,corrosions and tarnishing. ●Notice: Fits 8mm-12mm or 1/3" to 1/2" Thick Glass,largest bearing 40 lbs per hinge ●Self closing from 25 degrees and self centering to 0 degrees in the closed position ●Sturdy and durable;Easy to install