Common wall-fixed systems comprise parallel metal strips (attached to the wall by screws) which have slots into which brackets can be fitted to hold shelves. Free-standing shelf frames are also usually manufactured from metal (usually steel) though the shelves may be made of wood.
Material: Gauge steel
No weight rating available. bracket has three engagement teeth to secure bracket to standard for wider shelves . also comes with stabilizing lock lever to reinforce bracket attachment to standard.
It allows more flexible use of shelves to hold items of value for storage display or sale.