196 Series Universal Back Plunger Dial Test Indicator, 0 100, Adptr Attach Case no checkout square and hex shapes More groove square and hex shapes More groove positions provide the optimum hand location for a better grip on the work piece ProTouch™ grips provide extra comfort and reduces hand fatigue Ratcheting action allows GrooveLock to be adjusted from the open position up to the work piece by pushing the handle up no need to press the button one hand operation Tool steel drive gear for strength and durability Knurled slip resistant grip Accurate and reliable Few moving parts 3 different styles of contact points Simple operation