The wera kompakt interchangable slimline vde screwdriver set of 16 includes a kraftform hand held bit holder 817 vde for wera vde interchangeable blades the vde interchangeable blades each 154 mm long have a reduced blade diameter with integrated protective insulation which allows sunken screws and spring elements to be accessed and actuated also included is a single pole voltage tester817 vde handle 9 x 102mm single pole voltage tester slotted 05 x 30 x 70mm interchangable bits all 154mm long s