The small 3/4 " x 1-1/2 " diamond shaped openings and heavy gauge of the flattened expanded metal on this truck provide maximum security for even the smallest items, while still allowing good visibility and air circulation. The double doors swing open a full 270 degrees, back to the sides and out of the way, and have a padlockable slide latch. Interior height 48 ", overall height 56 " with 2 swivel and 2 rigid, 6 " x 2 " non-marking polyurethane wheels.