To use these expansion bolts, simply drill a hole into the desired surface, insert the bolt, and tighten it to expand the shield. This process creates a strong and secure anchor point that can withstand heavy loads. The bolts are designed to work with concrete, brick, and other solid materials, providing a versatile and reliable fastening solution for various projects. Features -Color:Golden -Material:Carbon steel -Size:6.30X1.50X1.50cm/2.48X0.59X0.59in -Heavy duty performance: these expansion bolts are designed to deliver exceptional holding power for secure and stable installations -Shield anchor: shield anchor structure increases both tensile and shear strength -Versatile applications: suitable for a wide range of construction and renovation projects, these bolts meet various installation needs - construction: made from Carbon steel materials, these bolts are built to last and resist damage, ensuring long term use -Simple installation: easy to install, these bolts are suitable for both professional builders and diy enthusiasts, saving Package list: 12pcs expansion bolts