1, Easy installation without any special tool, 2, great grip strength 3, anti-corrosion and anti-loose and aging Materials&StructureSuspension head:It's made of Aluminum splint,U-card,preformed armor rods and rubber calmp.Aluminum Splint:By the anti-corrosion, high strength aluminum alloy die casting made of aluminum and chemical properties of the stable, good resistance to atmospheric corrosion, ...