a motor;

an output shaft to be coupled to a tip tool;

a transmission mechanism configured to transmit motive power of the motor to the output shaft;

an acquirer configured to acquire, based on a current flowing through the motor, a torque value related to output torque provided by the tip tool;

a trigger switch configured to accept an operating command entered by a user; and

a controller having a torque management mode in which the controller controls the motor in accordance with the operating command entered through the trigger switch and prevents the torque value acquired by the acquirer from exceeding an upper limit value,

the controller being configured to, when finding a predetermined condition satisfied in the torque management mode, control the motor to forcibly turn a velocity of the motor into a predetermined restriction value irrespective of a manipulative variable of the trigger switch,

the predetermined condition including a condition that the torque value acquired by the acquirer reach a threshold value smaller than the upper limit value,

the controller being configured to, when finding that the torque value acquired by the acquirer reaches the upper limit value after the predetermined condition is satisfied in the torque management mode, control the motor to stop running.