Abstract: A screwdriver is less likely to have an increased overall length. A screwdriver includes a motor, a push-in clutch located frontward from the motor, the push-in clutch being drivable by the motor, a spindle located frontward from the push-in clutch, the spindle being drivable by the push-in clutch, a push-in sensor located radially outward from and below the push-in clutch, the push-in sensor being configured to detect the push-in clutch being pushed in, and a battery configured to power the motor.

Abstract: A concrete vibrator can further reduce vibration. The concrete vibrator includes a motor, a flexible shaft drivable by the motor, an unbalanced weight drivable with the flexible shaft, a flexible hose at least partially covering the unbalanced weight and the flexible shaft, a body housing accommodating the motor, and an elastic member between the body housing and the flexible hose.

Abstract: An electric work machine allows use of batteries with different sizes with battery covers and allows easy maintenance of a damaged battery cover. A rechargeable concrete vibrator includes a motor, a motor housing accommodating the motor, a battery holder connected to the motor housing to receive a battery in a detachable manner, and a battery cover to cover an overall part of the battery held by the battery holder. The battery cover is attachable to and detachable from the battery holder.

Abstract: A screw driving includes a housing, a motor, a spindle, a locator, a first detecting mechanism and a controller. The locator is mounted on a front end portion of the housing so as to be movable in a front-rear direction relative to the housing and configured to define a depth to which a screw is driven into a workpiece. The first detecting mechanism is configured to detect a position of the locator in the front-rear direction. The controller is configured to control driving of the motor. Rotational driving of the spindle in a forward direction is started in response to the spindle being pressed rearward, and the rotational driving of the spindle in the forward direction is stopped when the first detecting mechanism detects that the locator is disposed in a specified position rearward of a most forward position within a moving range of the locator.

Abstract: A screw driving includes a housing, a motor, a spindle, a locator, a first detecting mechanism and a controller. The locator is mounted on a front end portion of the housing so as to be movable in a front-rear direction relative to the housing and configured to define a depth to which a screw is driven into a workpiece. The first detecting mechanism is configured to detect a position of the locator in the front-rear direction. The controller is configured to control driving of the motor. Rotational driving of the spindle in a forward direction is started in response to the spindle being pressed rearward, and the rotational driving of the spindle in the forward direction is stopped when the first detecting mechanism detects that the locator is disposed in a specified position rearward of a most forward position within a moving range of the locator.