Compatible Brand: NSK Compatible OEM Model: EX-6 Compatible OEM P/N: EX-6 M116 Quick Connect: Yes ISO Type: E-Type Head Type: Positive Locking Gear Ratio: 1:1 Speed: Up to 40,000 RPM Bur Change: Positive locking open/close mechanism Bur Type: Lab Bur Air Pressure: 30 to 42 PSI Weight: 65g Warranty: 6 Months