Johnson Level Tool RAS-120 Aluminum Rafter Square 12 in

Product Description

The Johnson Level Tool RAS-120 is a 12-inch aluminum rafter square designed for layout work on roof framing, stair stringers, and general carpentry applications. The body is solid aluminum with CNC-machined edges for consistent accuracy across repeated use. A low-glare powder-coated finish reduces eye strain in bright jobsite conditions. Permanent graduations and numerals resist wear over time. The thick edge doubles as a reliable saw guide, and scribe notches starting at 1-3/4 inches allow easy transfer of outside increments from the pivot point. A complete instruction manual with rafter tables is included.

This square is suited for residential and light commercial framing work. The 12-inch blade length spans wider lumber, which simplifies layout and measurement tasks on boards that a standard 7-inch square cannot reach in a single pass. It is a standard tool for carpenters, framers, and general contractors who need a dependable layout reference on dimensional lumber and engineered wood products.

Key Features

• Solid aluminum body with CNC-machined edges for dimensional accuracy and long-term durability
• Low-glare powder-coated finish reduces glare in direct sunlight
• Permanent graduations and numbers remain legible after heavy jobsite use
• Thick edge serves as a built-in saw guide for crosscuts and angle cuts
• Scribe notches starting at 1-3/4 inches for transferring outside increments from the pivot point
• 12-inch span covers wider boards in a single measurement, reducing layout steps
• Includes complete instruction manual with rafter tables

Compatibility

Designed as an OEM-style replacement or direct-use layout tool for residential and commercial framing applications requiring a 12-inch rafter square.

Installation Notes

This tool requires no installation. Carpenters and framers should inspect the machined edges before use to confirm they are free of burrs or damage that could affect layout accuracy. Store flat to prevent warping of the aluminum body. Keep away from contact with corrosive materials that could degrade the powder-coated finish over time.

Technical Specifications

• Blade Length: 12 inches
• Material: Aluminum
• Finish: Powder coated, low-glare
• Edge Machining: CNC-machined
• Scribe Notch Start: 1-3/4 inches from pivot point
• Weight: 1.369 pounds
• Sold As: Each

Standard Information

• Brand: Johnson Level Tool
• Manufacturer Part Number: RAS-120