Fangrui Product Details Made Of High Quality Material, And Practical To Use.solid And , Long Service Life.easy To Install And Reliable To Use.universal String Trimmer Grass Eater Cutter Adjustable Support Wheels Set The Wheels Look Small But Can Provide Stable Support. With These Wheels, You T Be Troubled By Sore Hands And Shoulder Pains Even Holding Tools For A Long . Can Cause Sore Hands And Shoulder Pains. You Can Cut The Grass Likes Walking. The Buckle Of The Wheels Is Made Of Soft Plastic, Which Allows The Wheels To Suit 22mm(0.86 Inches) To 26mm(1.0 Inch) Shaft Tubes. Perfectly Suitable For Most Straight Shaft Wackers, Edgers, And Mowers On The Market. There Are Three Holes On The Bracket, You Can Adjust The Height Of The Wheels By Fixing The Wheels Into Different Positions. The Height Of The Support Wheel Can Be Adjusted According To Your Height And Can Be Raised Or Lowered, Making Your Work Easier And No Need To Bend. Buckle Has Different Gears Of Different Angles . According To The Users Height And The Needs Of The Use