Why Do My Fingers Twitch? Common Causes, Treatments, And When To Seek Medical Help 1 HP 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