Overview Reviews Product Description 6.6mm Extra Long Pneumatic Valve Guide Driver 9" OAL valve guide driver for use with Pneumatic Air Hammer. Product Videos Product Reviews Write a Review Write a Review × 6.6mm Extra Long Pneumatic Valve Guide Driver Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *