Extremely strong and features 2-way adjustment for perfect horizontal leveling. Made of 18-8 stainless steel and 356 anodized aluminum, it quickly detaches without tools for compact storage leaving no hardware on the rail. NOTE: 7/8” or 1-1/8” plastic rail size adapters in the 300 series round rail mounts are not recommended for use with the A10-1225 “Monterey” or A10-1218 "Catalina" Gourmet Series Gas Grills. When using these models on 7/8" or 1-1/8" round rails, use "Dual" Horizontal Round Rail Mounts.