Adjustable Chains : Gas cylinder fixed Rack is equipped with adjustable protective chains, you can adjust the length of the chains according to your needs. It holds cylinder tightly in place so that it won't slip out even if cylinder is tilted Fixing Hole Mount : There are fixing holes on the bottom plate of the gas cylinder holder, you can use expansion screws to fix the gas cylinder rack firmly on the wall to enhance its stability Versatile Usage : Suitable for both indoor and outdoor use Widely Used : Cylinder bracket is suitable for home/hospital/laboratory/factory/school, it is ideal for storing various gas cylinders such as coal gas, nitrogen and acetylene Strong Steel Build : Our heavy-duty gas cylinder racks are made of 304 stainless steel, and thickened and reinforced to ensure maximum durability against chips and scratches