Horsepower-House 43mm OD / 30mm ID Swingarm Swinging Arm Pivot Castle Nut Thrust Lock Adjuster Socket 4 Pin Spanner Tool Fits many Suzuki GSXR600 GSXR750 GSXR1000 and MANY MORE Size Equivalent to Suzuki Tool Part Number 09940-14940 fits many Suzuki GSXR600 GSXR750 GSXR1000 models. Measure your locknut and compare to size of tool shown here. Items that were used are not returnable (unless they failed/broke under competent use.) If you return an item that was clearly used (yet you state it was "not needed" or "accidentally purchased" or similar reason) you will not receive a full refund. Please note this very fair policy. Impact / Power drill is NOT recommended when using tools like this. Lubricate the threads thoroughly prior to use. A breaker bar might be helpful for difficult jobs. See specs in photos and compare to your application if you are unsure of fitment. ALSO KNOWN AS ENGINE PIVOT THRUST ADJUSTER LOCKNUT SOCKET TOOL ALSO KNOWN AS 30mm / 43mm CASTLE NUT ADJUSTER TOOL. Make sure you measure your locknut and compare to size of tool shown here.