Aluminum Bead Breaker • Engineered To Work On All Rim Types Including: Most New High Flanged 3-Piece Wheel Assemblies; And All Single, Two, And Three Piece Tires And Rims. Ideal For Heavy Duty Truck; Construction Wheels; Farm Equipment; Graders; Combines; Forestry Equipment And Skidders • Use With All 3-Piece Wheels That Replace Older 5-Piece Wheels • Lightweight, High Strength Aluminium With Metal Jaws • Both Clamping and Bead Breaking Actions Are Performed Automatically • The Clamping Jaw Pivot Pin Can Be Placed In One Of The Four Jaw Pivot Positions For Use With Different Width Flanges