EASY INSTALLATION: There are four pre-drilled holes in the mounting plate that fit perfectly with the screws for easy installation Advantages: There is no need to consider the thickness of the floor when purchasing, and two types of screws are provided to solve the installation problem. PACKAGE INCLUDED: 4 legs, enough of screws, 4 floor protectors, for floor protectors, to protect your floor from damage, or as an additional stabilizer for a rocking chair or table. Materials: These hairpin legs are made of 1/2-inch tubular cold-rolled sturdy steel. The heavy-duty legs feature a black powder-coated finish that prevents rust and corrosion resistance for long-term use. Four legs can support up to 800 pounds. Design: Provides a sturdy, stable platform that can be adjusted in height at will.