Johnson Level 4.5 in. Aluminum Johnny Square (Model 1904-0450)

The Johnson Johnny Square 4-1/2 in. finish square is engineered for precision carpentry and tight-space work. Crafted from extruded aluminum with CNC-machined edges, it delivers accurate 90° and 45° layout every time. Its low-glare anodized finish and laser-etched EZ-Read graduations ensure clear visibility, even in bright sunlight, while strong magnets hold the square firmly against metal surfaces for hands-free marking.

Compact yet feature-packed, this 4.5 in. square includes continuous scribing notches for ripping lumber from 1½ in. to 3½ in., plus markings for common 2×4 dimensions. An erasable note area on the back lets you jot finish details on the fly—ideal for finish carpentry, trim work, and quick angle checks.

Key Features

• Durable aluminum body with precision CNC-machined edges
• Glare-resistant EZ-Read anodized finish with laser-etched graduations
• Continuous scribing notches for 1½ in. to 3½ in. cuts and 2×4 layout
• Strong integrated magnets for hands-free positioning
• Compact 4.5 in. size fits tight corners and small workspaces
• Erasable back surface for finish notes and measurements