100/10sets Metal Expansion Tube Pipe Serrated Steel Wall Self Tapping Screw Drilling Plug for Wall Fasteners Bolt Improvement

SpecificationsMaterial: plain carbon steelSize: Style 1 (Expansion tube inner diameter 6mm, length 32mm; screws 5x40mm)Style 2 (Expansion tube inner diameter 8mm, length 38mm; screws 6x40mm)Style 3 (Expansion tube inner diameter 8mm, length 60mm; hexagonal head screw 6x60mm)Style 4（The combination is about 5.50.50.5cm, the screw is 3.5cm, and the expansion tube is 3cm）Applicable to: fixed home, room decoration, etc