Johnson Level Tool ADS48 Adjustable Drywall Square 48 in

Product Description

The JOHNSON LEVEL TOOL ADS48 is a 48-inch adjustable drywall and layout square built for general carpentry and sheet-goods work. The blade and head are extruded aluminum, 1/4 inch thick, finished with a clear anodized coating that resists rust and corrosion. Graduations are screened and thermal-bonded in bold black at 1/8-inch and 1/16-inch increments, keeping them readable under job-site conditions. The head adjusts to any angle and precision-machined mating surfaces lock the head and blade at a true 90-degree angle when needed. Weighing 2.875 pounds, it is light enough for repeated single-handed positioning across full sheets of material.

The ADS48 is suited for residential and light commercial carpentry where fast, accurate layout lines are needed on plywood, OSB, drywall, and similar board materials. It is a go-to tool for framers, drywall hangers, and finish carpenters marking cut lines before scoring or sawing. The 48-inch length spans a standard 4-foot sheet width in a single pass, reducing the need to reposition the square mid-mark. The folding design flattens the tool for transport in a tool bag or truck bed without snagging other equipment.

Key Features

• 48-inch extruded aluminum blade and head, 1/4 inch thick for rigidity without excess weight
• Clear anodized finish resists rust and corrosion in damp job-site environments
• Screened, thermal-bonded graduations in 1/8-inch and 1/16-inch increments for durable readability
• Head adjusts to any angle and locks at precision-machined 90-degree reference
• Folds flat for compact storage and transport

Compatibility

Designed for use on standard sheet goods including plywood, OSB, drywall, and similar board materials common in residential and light commercial carpentry applications.

Installation Notes

Handled by carpenters, drywall hangers, and general contractors as a layout tool rather than a fixed installation component. Before adjusting the head angle, ensure the locking mechanism is fully released to avoid stressing the precision-machined joint. After setting the desired angle, confirm the lock is fully engaged before scribing a line. Keep the anodized blade surface clean of drywall compound and adhesives to maintain accurate edge contact with the work surface.

Technical Specifications

• Blade Length: 48 inches
• Blade Thickness: 0.25 inches
• Material: Extruded aluminum
• Finish: Clear anodized
• Graduation Increments: 1/8 inch and 1/16 inch
• Weight: 2.875 pounds
• Unit of Measure: Each

Standard Information

• Brand: JOHNSON LEVEL TOOL
• Manufacturer Part Number: ADS48