World's strongest fastening system. WingIts patented commercial grab bar fastening system for installing grab bars into framed walls. For commercial, institutional, and hospitality applications. | Fireproof, stainless steel, waterproof fastening system | Installs in minutes into wall substrates up to 1-1/2 In. thick, the commercial standard for grab bar installations | Requires 1-1/4 In. hole for installation-use with APACHE200 industrial carbide drill bit (Rated at 200 holes in ceramic wall tile) | Two GBW40's are required to install a typical grab bar, rated up to 800 Lbs. Does NOT come with mounting hardware.