A tool bag that includes a tool bag body formed from a base with first and second endwalls attached to opposite end portions of the base. The tool bag body also includes a first sidewall attached to a side of the tool bag body that is releasably attached to the first endwall and releasably attached to the second endwall, and a second sidewall attached to a second side of the tool bag body opposite the first sidewall. The second sidewall includes a sidewall section flexibly joined to a cover section, where the sidewall section is releasably attached to vertical portions of the first endwall and the second endwall. The removable cover is removably attachable to a top portion of the first and second endwalls. The tool bag can also include a rotatable handle and a tool wall for simple, secure storage of tools.