Johnson Level Tool RAS-1B 7 Inch Aluminum Rafter Square

Product Description

The JOHNSON LEVEL TOOL RAS-1B is a 7-inch aluminum rafter square built for professional-grade layout work on the job site. The body is machined using CNC (Computer Numerical Control) technology, delivering precise edges for accurate angle marking, stair layout, and roof rafter cuts. A low-glare powder-coated finish reduces eye strain in bright conditions. Permanent graduations and numbers are laser-etched for long-term readability even after heavy use. The thick edge doubles as a saw guide, making it a practical single-tool solution for carpenters, framers, and general contractors who need consistent results on repetitive cuts.

The RAS-1B is suited for residential and light commercial framing applications. The 7-inch size is the standard choice for marking and cutting dimensional lumber. Continuous scribing notches at 1/8-inch intervals allow fast rip lines, with dedicated notch positions optimized for common rip widths of 3.5 inches and 5.5 inches. This square is a standard carry for framers, finish carpenters, and roofing crews working with 2x4 and 2x6 stock.

Key Features

• Solid 7-inch aluminum body resists flex and corrosion
• CNC-machined edges for precise, repeatable angle transfers
• Thick edge functions as a direct saw guide
• 1/8-inch continuous scribing notches for fast rip layout
• Optimized notch positions at 3.5 inches and 5.5 inches for dimensional lumber
• Low-glare powder-coated finish for comfortable use in bright light

Compatibility

Designed as a standard 7-inch rafter square for use with dimensional lumber in residential and commercial framing, roofing, and finish carpentry applications.

Installation Notes

No power tools or fasteners are required for use. Ensure the square is seated flush against the lumber edge before scribing or cutting to maintain accuracy. Keep the machined edges clean and free of debris to preserve measurement integrity. This tool is intended for use by qualified carpenters, framers, and roofing professionals following applicable local building codes.

Technical Specifications

• Blade Length: 7 inches
• Material: Aluminum
• Scribing Notch Interval: 1/8 inches
• Optimized Rip Notch Positions: 3.5 inches and 5.5 inches
• Finish: Powder-coated, low-glare
• Weight: 0.474 pounds
• Unit of Measure: Each

Standard Information

• Brand: JOHNSON LEVEL TOOL
• Manufacturer Part Number: RAS-1B