30 Pieces Metal Expansion M421 Hollow Brick Dowel, Galvanized Steel Expansion Screw, Metal Expansion Dowel, for Hollow Plaster Plates Hollow Walls

Expansion Metallics 30 pieces per pack, Expansion Metallics M4*21suitable for boards with a thickness of 0.11-0.31"/3-8mm. Dowel is made of galvanized carbon steel. Dowel is resistant to high temperature and corrosion and is durable. When the Metal Pegs support is pulled to form a larger contact area, both sides of Metal Dowels extend to form a petal shape, making it less likely to loosen. Simply drill a hole, screw in Expansion Metallics, extend Expansion Metallics about 6mm, place it on the mounting clamp and press to unfold the expanding metal wing. Hollow Brick Dowel Applicable to hollow walls, hollow bricks, wood panels and plasterboard. Hollow Brick Dowel Also applicable to mechanical, naval, industrial construction, etc.