ToolBox Talk #42: HAND ARM VIBRATION SYNDROME (HAVS) As the majority of our operations involves working with our hands in some capacity whether it is hitting a hammer, using power tools, 10 second finger tap, 10 Seconds Finger tap test. Simple. Powerful. Underrated., We use it daily to assess patients., Ask someone to tap their index finger and thumb as fast as possible for 10 Hand arm vibration information for workers WorkSafe Vibration white finger (VWF): Definition, symptoms, and treatment Observations and Considerations for Implementing Vibration Signals as an Input Technique for Mobile Devices Finger Numbness and Tingling (Median Nerve Mobilization)