Power through grinding tasks in tight spaces with the Astro Tools 30045 ONYX 4.5" Compact Air Angle Grinder! This grinder offers 4.5”disc size, but in a surprisingly compact package. Measuring just 8.5" long, it tackles grinding jobs even in areas with limited access. A convenient push-button spindle lock allows for easy disc changes, while the 0.8 horsepower motor delivers a powerful 12,000 RPM for efficient material removal. Specifications: Free Speed: 12,000 rpm, Air Consumption: 4.2 CFM, Overall Length: 8.5", Air Inlet: 1/4", Air Hose: 3/8", Air Pressure: 90 psi