Rivnut Tool model RNA600 is used for sizes #6-32 and M3 to 1/4-20 and M6. Tool comes standard with one head, either 6-32, 8-32, 10-24, 10-32, 1/4-20, 5/16-18, M3, M4, M5, M6 or M8. 1/2 hp motor and double reduction gearing for exceptional power. Teasing throttle for precise control and forward and reverse trigger for one hand directional changes. 600rpm at 90psi max.We ship APO, FPO, International and combine shipping.