Crank Lobrazny ET1032 used to work with end heads having square drive 1/2 "Length knob -. 270 mm, this is the average length for use with face heads Therefore knob can be used to work with cars and trucks Material -.. Of chrome-vanadium . steel This steel is characterized by high strength and durability tool Convenience knob is in the handle, which has a notch -. they slip hands during operation.