Jewel Sun windows & doors adopt the three-layer laminated wood finger joint material. The path slices plank, means the surface breadth and annual growth rings close to 90 degrees, the timber veins presents a straight line. So this kind of timber has high compressive strength, flexural strength and bending strength, and is neither easy to expand when it's dry or easy to shrink when it's humid, nor easy to warp or crack.. The path-cut laminated material not only ensures the unity of stable performance and nice external appearance, but also greatly prevents the defects of the timber from having an impact on the quality of the products.Characteristics of the hardware ?Beauty and tidinessHardware and linkage bodies are hidden in the hardware slot of the doors and windows.?Simple operationDifferent opening manners make the opening and closing laborsaving?High bearing capac ityThe deadweight of the windows and doors can reach 240 kg.?High securityThe multiple locking point design of the windows strengthens the tightness performance , and the anti-theft performance meets the German standard DIN18054.?3D adjustmentThe tightness degree can be adjusted at any time.?DurabilityAfter more than 20,000 times open-and-close exhaustion test, it does not become loose.?Corrosion resistanceParticular surface treatment technique enhances the corrosion resistance.