Special Three-piece Built-in Expansion Bolts for Hollow/Porous/Foam Brick

The three-piece design enables stable expansion and gripping within porous substrates, making them ideal for installations on hollow, porous, or foam brick. Available in multiple sizes and styles (including hook-type and diverse head options as shown in the image), they meet diverse needs for both professional contractors (renovation projects) and DIY enthusiasts (decor fixing). Choose our three-piece expansion bolts for hassle-free installation and long-lasting hold in special brick materials!