Not good , out of 10 go,s you may get 2 solders that are ok storage box poor metal over priced. Prince August Response: The quality of casting depends on the caster and their technique. It is rarely the fault of the moulds and if a mould causes problems please email us so we can advise on how to proceed. If you wish to procure metal elsewhere you can always buy the moulds separately or in a bundle if available. The box is a sturdy cardboard box that is perfectly suitable for storage of moulds and metal.