General 18 Round Head Protractor 6 Inch Blade

Product Description

The GENERAL 18 is a round head protractor designed for precise angle measurement in the field or on the bench. The 6-inch blade gives technicians adequate reach when laying out or verifying angles on ductwork, conduit runs, pipe supports, and structural framing. The dial reads from 0 to 180 degrees with 1-degree graduations, and the instrument is accurate to 1 degree, making it a reliable hand tool for trade professionals who need repeatable angular measurements without complex setup.

This protractor is suited for use in HVAC duct fabrication and layout, plumbing rough-in, electrical conduit bending verification, and general mechanical trades work. It is equally at home in a sheet metal shop as it is on a job site. The round head design allows the user to lock and transfer angles quickly, which is useful during repetitive layout tasks or when fitting angled transitions.

Key Features

• 6-inch blade length provides reach for larger workpieces and layout surfaces
• 0 to 180 degree dial range covers the full range of common angular measurements
• 1-degree dial graduation allows precise, readable angle settings
• Accuracy to 1 degree supports consistent, repeatable layout work
• Round head design enables quick angle locking and transfer
• Compact and lightweight at 0.17 pounds for easy tool bag carry

Compatibility

Designed as a general-purpose hand measuring tool suitable for use across HVAC, plumbing, electrical, and mechanical trade applications requiring angle measurement up to 180 degrees.

Installation Notes

No installation is required for this hand tool. Keep the blade and head pivot clean and free of debris to maintain measurement accuracy. Store in a protective case or pouch to prevent blade damage and protect the dial face. Verify zero calibration periodically against a known reference surface before critical layout work.