Replace for 9704230 Blender Coupler Clutch with Spanner Kit. There are two ways to remove the old clutch 1. you can use a thin 7mm spanner to grip the flats on the spindle under the coupler then turn the coupler clockwise. 2. you can use a large flat bladed screwdriver to gently pry the coupler off the spindle. Pay attention to before using: 1. Please check whether the gear of the bottom loosens or tighten before use. If it's loosened, please tighten it 2. Please check the rubber gasket and be sure it is put snugly into the bottom blade. (The rubber gasket is used to avoiding a leak) 3. Do not overfill! To avoid spilling, do not add ingredients past the Max fill line 4. Place the replacement blade onto the cup and screw it tightly until you have a good seal 5. Please make sure it in the right place and locked tightly Fits Models: 4KSB5BK4 , 4KSB5BU4 , 4KSB5CR4 , 4KSB5ER4 , 4KSB5GN4 , 4KSB5MC4 , 4KSB5MY4 , 4KSB5OB4 , 4KSB5PK4 , 4KSB5SSOB , 4KSB5TG4 , 4KSB5WH4 , 4KSB5WW4 , 5KSB52-4 , 5KSB52AAC4 , 5KSB52ABU4 , 5KSB52ACR4 , 5KSB52AER4 , 5KSB52AGR4 , 5KSB52AMC4 , 5KSB52AMY4 , 5KSB52ANK4 , 5KSB52AOB4 , 5KSB52APK4 , 5KSB52ATG4 , 5KSB52AWH4 , 5KSB52BAC4 , 5KSB52BAC5 , 5KSB52BBU4 , 5KSB52BBU5 , 5KSB52BER4 , 5KSB52BER5 , 5KSB52BGR4 , 5KSB52BGR5 , 5KSB52BMY4 , 5KSB52BMY5 , 5KSB52BNK4 , 5KSB52BNK5 , 5KSB52BOB4 , 5KSB52BOB5 , 5KSB52BPM5 , 5KSB52BWH4 , 5KSB52BWH5 , 5KSB52EAC4 , 5KSB52EAC5 , 5KSB52EBU4 , 5KSB52EBU5 , 5KSB52ECR4 , 5KSB52ECR5 , 5KSB52ECV5 , 5KSB52EER4 , 5KSB52EER5 , 5KSB52EGR4 , 5KSB52EGR5 , 5KSB52EMY4 , 5KSB52EMY5 , 5KSB52ENK4 , 5KSB52ENK5 , 5KSB52EOB4 , 5KSB52EOB5 , 5KSB52EPM5 , 5KSB52ETG4 , 5KSB52ETG5 , 5KSB52EWH4 , 5KSB52EWH5 , 5KSB52SBU4 , 5KSB52SBU5 , 5KSB52SER4 , 5KSB52SER5 , 5KSB52SGR4 , 5KSB52SGR5 , 5KSB52SOB4 , 5KSB52SOB5 , 5KSB52SWH4 , 5KSB52SWH5 , KSB33 , KSB3-3 , KSB3-4 , KSB5 , KSB53 , KSB5-3 , KSB5-4