Sealey vs019 dual mass flywheel measuring tool sealey vs019 p this measuring tool from sealey is essential for testing the condition of a dual mass flywheel dmf use with the dmf fitted to the vehicle and with the gearbox clutch removed fitting a new clutch with a faulty dmf may result in early failure of the new clutch results must be checked against the vehicle manufacturer s specification p p contents br slotted bar slotted bar adaptors x 6 angular torque gauge dti gauge dti