1/4" Air Inlet & 1/8" Collet Size: Compatible with most air systems and accessories, ensuring versatile and efficient operation for detailed grinding tasks Perfect for Sanding, Polishing, and Grinding: Ideal for achieving smooth finishes and precise surface work on a variety of materials. Twist Throttle with Variable Speed Control: Allows precise speed adjustments, giving you full control for different tasks and materials. Maximum Pressure 90 PSI ensuring consistent power and reliable performance for demanding task Lightweight & Compact: Designed for easy handling, making it perfect for reaching tight spots and working in confined spaces Free Speed: 70,000 RPM for fast and efficient grinding, sanding, and polishing If the tool requires additional force to complete the task, verify that it is receiving sufficient, unobstructed airflow (CFM). Adjust the regulator to increase the PSI output, ensuring it does not exceed the tool's maximum rated air pressure for optimal performance.