Suitable for use with most counterclockwise turning trimmers up to 40cc these aluminium jet fit trimmer heads from oregon are very easy to load and even easier to fit supplied with a range of adaptors allowing this unit to be fitted directly to the trimmer39s blade bolt supplied with oregon39s high performance flexiblade line these jet fit heads are ready to go straight out of the box however they can be loaded and with all varieties trimmer line to suit the needs of the user and the