Threaded mounting : M10 x 1.25Thread type: thread leftThread type: round thread with diameter 2.4 mm, suitable for to threads up to 3 mmCapacity : approx. 8.5 m for 2.4 mm wires (less for stronger wires)Easy to install. fill out thanks to Easy loading feature: simply place the two arrows on the head together. You can now use approx. Insert an 8.5 m line so that the 1.5 m wire protrudes from both sides of the head. When this is done, simply turn the tap knob in the middle clockwise and the thread winds up by itself! Thanks to the proven automatic striking mechanism, the line then comes out of the spool as soon as you tap the ground and the metal rocker extends the life of the head several times Ideal for mowing and trimming grass and weeds on large areas.