A chuck includes a body having an engaging groove for releasably receiving a bit. A sleeve is mounted around and movable relative to the body along a longitudinal axis of the body between a coupling position in which the bit is retained in the engaging groove and a releasing position allowing removal or insertion of the bit. The sleeve further includes an engaging section that slideably abuts a coupling section of the body. The engaging section is engaged with the coupling section to allow joint rotation of the body and the sleeve about the longitudinal axis. The sleeve further includes a flange with a frictional outer periphery to provide friction when the sleeve is manually rotated about the longitudinal axis by rotating the frictional outer periphery. Furthermore, the flange can be gripped by a user to move the sleeve to the releasing position.