Crank Tobrazny ET1021 used to work with the end heads having a square drive 1/2 "characteristic feature of knob Tobraznogo is its length and the manufacturing material of the driver length 250 mm -.. Is the average length for operation with end heads Material -. Chrome vanadium steel . This tool steel characterized by high strength and durability. Ease with Tobraznym it is reversible in its floating head, which moves from one end to the other of the driver. This Spaws bstvuet fixing floating head in the center and circumference of the bar knob opportunities on both sides.