for bending copper and aluminum sheet Bending with 90 degreewill not damage the brass &aluminim. CB-150D can be opened upăwhen bending long brass sheet"N"shape or "L"shape can pull the lock out, so you can take the whole one freely. There is an indication of 90°and 45° showing on the ground sheet. bending force: 20T max thickness of sheet: 12mm width of sheet: 200mm height: approx.370mm weight:approx.18k