- 90 degree surface mount hidden hinges for frameless cabinets: opens to 90 degrees and designed specifically for frameless cabinet doors. Not compatible with framed cabinets. Suitable for door thickness 0.6 to 0.95 inches. - Easy install for frameless cabinets: no drilling required. Simply mark the screw locations and fasten. - Durable concealed hinge: made of cold-rolled steel with a nickel plated finish for long lasting durability. Corrosion resistant and rust proof. - Soft close with hydraulic mechanism: built in hydraulic system provides a smooth, quiet closing action. - Use scenario 1: install on kitchen frameless cabinets to achieve a clean, hidden hinge look without visible hardware. - Use scenario 2: upgrade bathroom vanities or modern storage with frameless doors to improve closing feel and longevity. - Use scenario 3: apply to office or entertainment furniture with frameless panels for quiet operation and durable performance.