Abstract: A band saw including a housing, a motor, a drive pulley configured to receive torque from the motor, and a plurality of driven pulleys rotatably coupled to a plate, in which the plate is coupled to the housing for sliding movement. The band saw further includes a cavity within the housing and located between the drive pulley and the plurality of driven pulleys and an endless saw blade wrapped around the drive pulley and the plurality of driven pulleys. A first of the driven pulleys is rotatable about a first axis oriented perpendicular to the plate. A second of the driven pulleys is rotatable about a second axis that is obliquely oriented relative to the plate to impart a twisting movement to the saw blade about an oblong path defined by the saw blade, prior to the saw blade passing through the cavity.

Abstract: A grinder including a housing, a motor within the housing, and a first handle attached to the housing and including a first sensor configured to detect the presence of a user. The grinder includes a second handle attached to a pivot arm, the pivot arm attached to the housing and configured to be pivoted around the circumference of the housing, the second handle including a second sensor configured to detect the presence of the user. The grinder includes a controller configured to control the motor based upon the detection of the presence of the user by the first sensor and second sensor, and wherein the controller prevents the motor from operating when second sensor does not detect the presence of the user.

Abstract: A concrete vibrator includes a housing, a strap, an electric motor, a flexible shaft, a vibrator head, and battery pack. The strap is removably coupled to the housing. The electric motor s coupled to the housing. The flexible shaft has a first end coupled to the motor and an opposite, second end. The vibrator head is coupled to the second end of the shaft. The vibrator head is configured to receive torque from the motor and the shaft to cause the vibrator head to vibrate. The battery pack is coupled to a battery receptacle defined on the housing. The battery pack is configured to provide electric current to the electric motor to drive the motor and the shaft. The concrete vibrator is operable in a messenger bag configuration in which the strap is used to carry the concrete vibrator with the housing in a horizontal orientation.