Ally Hardware Co. Ltd

Model Number: DC-19 Brand Name: ALLY Key Specifications/Special Features: Available for metal, steel and wooden doorsFeatures:Calm and quiet when be usedBody: adopts aluminum alloy one-time extrusion forming, with dense material and high strength, with surface spray coating treatment, with delicate lockPiston material: 45# steel, with surface carburization treatment for high strength and wear-resistant

Gear shaft material: 45# steel, with surface carburization treatment for high strength and wear-resistant

Spring: adopts spring steel, with <1mm shortening after 300,000 times squeezing

At door opening, spring is compressed at door closing, spring is stretches to produce door closing force to close door

Swing arm material: cold-rolled sheet, main function is to retransmit door pushing force to piston and to spring and transform spring force in door closing force to realized door closing