.| Justrite Rigid-Lock Support Quad Frac Tank Berm Justrite Rigid-Lock Support Quad Frac Tank Berm Pulling up on the wall secures it the upright position. The Rigid-Lock is a single piece construction and requires no assembly. One Piece - No Assembly - No Parts to Lose The Rigid-Lock QuickBerm® is the best-selling spill berm on the market, setting the bar for ease of use, durability and time to deploy/stow.