Spi 13-189-6 Rectangle Head Protractor and Depth Gage

Product Description

The SPI 13-189-6 is a rectangle head protractor and depth gage designed for precise angle and depth measurement in trade and industrial applications. The tool measures angles from 0 to 180 degrees in 1-degree graduations and rules from 0 to 6 inches in 1/32-inch graduations. The 1/4-inch wide rule slides through the rectangle head, allowing it to function as both a protractor and a depth gage in a single tool. Licensed technicians, machinists, and pipefitters reach for this type of combination tool when layout work demands repeatable angle setting and depth verification on a common instrument.

This protractor and depth gage is suited for use in shop floor, field fabrication, and installation environments where accurate angular layout and depth checks are required. The rectangle head measures 3-3/8 inches in length and 2 inches in width, giving it a stable reference surface against workpiece edges. The 1/4-inch wide rule fits standard protractor head slots and is graduated in 1/32-inch increments for fine linear measurement. Typical applications include duct fabrication, pipe layout, structural fitting, and general metal fabrication work.

Key Features

• Angle measurement range of 0 to 180 degrees with 1-degree graduation for precise angular layout
• Rule measurement range of 0 to 6 inches with 1/32-inch graduation for fine linear and depth readings
• Rectangle head measures 3-3/8 inches long by 2 inches wide for a stable reference surface
• 1/4-inch wide rule doubles as a depth gage blade for combined functionality
• No hook on the rule keeps the profile low-profile and versatile across multiple layout tasks
• Weighs 1 pound for easy one-handed use during layout work

Compatibility

Designed as an OEM-style combination measurement tool compatible with standard rectangle head protractor sets requiring a 1/4-inch wide rule blade.

Installation Notes

This tool is used by tradespeople for layout and measurement work, not for permanent installation. Keep the rule clean and free of burrs to ensure smooth adjustment through the head. Store the rule and head assembled or in a protective case to prevent damage to the graduation markings. No power shutoff or code compliance is required for use of this measuring instrument.