For 50cc-125cc Motorcycle ATV Dirt Bike Go Kart Pit Bike 4 Wheeler Inner Diameter(upper): 20mm/0.78 inch; Inner Diameter(under): 24mm/ 0.94 inch 4-pin socket clutch nut tool, each end has 4 pegs Solid steel material, sturdy construction, durable in using Please compare your old part to make sure the clutch lock nut spanner socket is the one that you need Fitment: For 50cc-125cc Motorcycle ATV Dirt Bike Go Kart Pit Bike 4 Wheeler Removes 14mm Clutch Locknut on: Crf50, z50, xr50, atc70, c70, cl70, crf70, sl70, trx70,xl70, xr70, trx90 Also can be used for 14mm clutch lock nut on: crf50, xr200 1980-1984, xr200r 1984-1994, xr250l 1991-1994, xr250r 1986-1994, cl, ct, sl xl models Features: Inner Diameter(upper): 20mm/0.78 inch Inner Diameter(under): 24mm/ 0.94 inch