Four-wings is 4 Strings string trimmer head with Bump & feed system and long strings. It is universal weeding tool that can be mounted with almost all brush-cutters and lawn trimmers, regardless of engine or battery or counter-clockwise or clockwise machine. 《Character》 1. Strong cutting force 2. Bump & feed system 3. String change without dismantling 4. Universal type / screw mount type 5. Containing long strings 6. String Diameter 1.6 ~ 3.0mm available 7. counterclockwise / clockwise both available 8. Use reliable material 9. Safety You can also see other videos and information below E-Catalogue http://twoytech.com/four_wings/en/ YouTube Channel : https://www.youtube.com/channel/UCnv804DKSOU_gkx-wuGV8mQ Facebook Page : https://www.facebook.com/fourwings.kr/ Homepage : http://twoytech.com/en #Twoy #fourwings #stringtrimmer #weedeater #Dogreen #trimmerhead #grass #lawn #lawntrimmer #brushcutter