Clearly built to a price ...the screw holes were poorly made or had dwarf in them...and the spanners provided too small until the gap between the screw head and surface was tiny. The screws themselves are just painted black and made of soft alloy, meaning that they both scratch easily and the surfaces deform as you tighten them ( another reason for using a proper spanners not the one provided). What is annoying about this is that it was avoidable for about a pound more on the production cost. There was also a sort of sellotape on the surfaces if the slats which took ages to get off. I expect we'll get five or so years out of it..,