8 Key SetSizes Include: TR9, TR10, TR15, TR20, TR25, TR27, TR30 And TR40Tamper-Resistant Torx Drive Has Hole In Center Of Key To Accommodate Post In Screw HeadDurable GorillaGrip Handle Is Stronger Than Steel HandlesPrecision Cut And Chamfered Tip Ensures Full Tool Engagement In The ScrewTurn And Flip Feature Eliminates Constant Removal And Repositioning In Screw Head When Working Against Obstructions90 Degree Stop Converts The Tool Into A Non-Stop, Time Saving, Speed Wrench