This round rail mounting bracket is made entirely of 18-8 stainless steel and 356 hard anodized aluminum. The quick-disconnect system allows for quick disassembly leaving no hardware on the rail. Designed for mounting rectangular or dual-mounted filet tables out over the water. NOTE: Not recommended for use with 12" x 24" rectangular grill. Not for use with 9" x 12" and certain 9" x 18" rectangular grill models. Refer to product owner manual.