Professional valve lapping tool attachment for commercial or own individual use Powered using either a drill or driver, this attachment automatically creates the valve lapping action required to make grinding valves quicker and easier 8mm centre shaft sizeValve lapping tool attachmentHelps you to install the valve correctlyUsing this tool can correct surface irregularities and eliminate subsurface damage of the new valveComes complete with 5 different sized rubber action cups Suitable for – fit and seat valves into your vehicle engine, corroded surface irregularities and eliminates subsurface damage of the new valvesElectric drill attachment provides increased control and productivitySuction cup sizes range from 16mm – 45mmFor use with fine grinding pasteAutomatically changes in directionSPECIFICATIONS•Valve Lapping Tool Attachment •For use with drill or driver•Spindle size – 8mm•Maximum working speed – 1250 RPM•Automatic direction change•Suction cups – 16mm, 20mm, 30mm, 35mm and 45mm.