400mm x 600mm Big J Pro Metric Aluminum Framing Square 1617EVSPK if there is a need

if there is a need for a clearance under the rod

Self-leveling within ±3 degrees horizontally and manual leveling in a vertical plane

Constant-Response™ Circuitry — Maintains constant speed under load

and drywall track effortless

400mm x 600mm Big J Pro Metric Aluminum Framing Square 1617EVSPK if there is a needThe Johnson Level 400mm x 600mm Big J Pro Metric Aluminum Framing Square features an aluminum body that will not rust or corrode. It comes in 600mm x 50mm body, 400mm x 38mm tongue that is 3mm thick. It features an EZ Read thermal bonded numbers and graduations in two millimeter increments. Ideal for framing and laying rafters in metric measurements, this Johnson Level 400mm x 600mm Big J Pro Metric Aluminum Framing Square includes metric rafter