The Whirlpool W11551646 Washer Nut Spanner is a specialist tool for loosening and tightening the tub nut on certain Whirlpool brand washing machines. This nut secures the motor's driving shaft to the wash basket, also known as the agitator. The spanner nut wrench comes in handy when the wash basket needs to be removed for repairs. The spanner nut has a distinct form that fits snugly onto the flats of the tub nut, allowing you to apply torque with a mallet or hammer. You can loosen the nut by striking it with the wrench in the correct direction counterclockwise. The spanner nut wrench is often built of strong metal to withstand the force required for disassembly.