Use the fixing information supplied for the exact shelf and the wall construction involved. The correct specification may include particular brackets, screw dimensions, mounting locations or restrictions on the supporting material.
A bag of included hardware does not necessarily mean every piece is appropriate for every wall. Read the complete guide and ask for clarification where it distinguishes between surfaces. Do not replace a specified fixing with a smaller or more convenient one because it fits an existing hole. Equally, a larger screw is not automatically a safer substitute. The connection needs to work as a system with the bracket and the wall. If the instructions do not cover your situation, seek manufacturer or competent installer advice before drilling. Keep the installation record so future checks or repairs can refer to the original requirements.
Match the bracket drawing to the hardware list before installation. If the instructions specify two mounting points, a single convenient fixing is not an equivalent arrangement, even when the shelf feels steady during an initial hand check.
For product comparisons alongside this advice, see SkyRoute wall climbing set and Feline Sovereign Spire. The details below explain their sizes and uses.
Further reading: .
SkyRoute wall climbing set
Feline Sovereign Spire