Arrow Sentry 6 x 5 storage shed. It is made up of sturdy steel and inside the Sentry shed your belongings are safe and easy to access with its pad-lockable, swing-open doors. The Sentry's assembly is quicker than some models. It is available in many sizes. It has faster assembly using "snap-together" rigid lock joint technology that can be built in 1 to 3 hours with two people and the panels "lock" into place for strong, pleasant looking panel.