The Bobrick B-5806.99 series Concealed Mounting with Snap Flange Grab Bar with peened nonslip gripping surface. The grab bar is made from 1-1/4-inch thick, 18-gauge type-304 stainless steel. Bobrick's lineup of superior quality grab bars, come in various standard sizes. These bars are designed to mount easily with wither vertical or horizontal installation. The screws are concealed by snapping down the flange covers after the bars are installed.