Power through grinding tasks in tight spaces with the ONYX 4.5" Compact Air Angle Grinder! This grinder offers the popular 4.5" disc with 7/8" arbor hole 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 and fast material removal • 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