The Back 2 wheels all have a locking mechanism so you don’t have to worry that it will roll away when stopping on a slope or a hill. The telescopic handle is made of reinforced aluminium alloy, which is light and durable and can be adjusted to 3 different heights. The box has large space and when not in use, this handy trolley folds effortlessly away and folds down to only 10cm wide for compact storage. The internal size of cart is H 34cms x W 39cm x D 38cm. External size of cart -H 47cms x W 46cm x D 39cm.