Light duty hidden hinge with steel/brass linkage

Expansion plasticconcealed hinge with steel/brass linkage in the center(furniture hinge,furniture fitting) Basic descriptions 1) Made out of soft nylon, approximated with YD-140-I. with steel/brass linkage in the center 2) Common finished with brown, othercolors to be chosen 3) FOB price valid within 15 days: 0.215 usd/pc We are factory, so our pricesare always reasonable Installation descriptions 1) Completely invisible when installed Outer body will expand when center screws aredrilled, reinforcethe strength with bored hole 2)Incorporated set screws expand wedge locks to secure in wood. No wood screws are necessary. 3) For wood up to 13/16" thick 4) Make mortise with a 12mm drill bit 5) Adivse 2 pcs for each door Specs descriptions