Very tough and rigid bin. Like most folks here, I use it with an Oneida Super Dust Deputy hooked up to a 1.5hp collector. The bin will not collapse under pressure from a 1.5hp collector, even when the motor is mounted directly on top of the dust deputy. The lid is flexible but very strong, I've had the total weight of the motor and dust deputy sitting directly on top without any support (just me keeping it from tipping over) and it held it just fine.