This 60" high wall-mounted system holds a ton of stuff – OK so it’s a half ton (1,000 lb.) of stuff. It comes with three 15" and four 12" arm supports. The 15" arms have a 9" height clearance while the 12" arms have a 7-1/4" height clearance. Wall brackets and support arms are zinc plated for an attractive appearance and mild corrosion resistance. Due to installation variables, the 14 required mounting screws and bolts are user supplied and dependent on whether the rack will be attached to studs or concrete and the expected weight to be supported. Mounting holes are 3/8" dia. Made in China.