NOTE: This item is constructed of natural wood and it may split or crack. This does not affect the structure or strength of the item. Even if there are cracks in the wood on delivery, this is completely normal and will not affect the strength and durability of the product. Constructed of pressure treated timber, this swing set is built to last. The 90mm top beam and 70mm legs provide maximum strength, ensuring your children stay safe at all times. Warning: We recommend small children are supervised by an adult at all times while on play equipment and you allow a safety perimeter. Tools including a drill are required in the assembly of this product.