Fitting twin-slot shelving

I see screwfix and toolstation do it , is their twin slot stuff any good ? spacing of the slots are slightly different from one brand

Constructed from steel and with a UDL weight capacity of up to 151kg per bracket , our twin slot shelving system can cope

twin happiness slot gratis I've just found some spur shelving info and the recommended screw size is a 12 gauge twin-slot shelf uprights and brackets

twin slot wall mounted shelving How to fit quick, easy and adjustable twin slot shelves in a shed It's extremely sturdy and ideal if you want to add or remove shelving at