A finishing tool, includes: a housing having a cylindrical holder chamber that opens toward a distal end and located along a central axis; a slide sleeve disposed coaxially with the central axis in the holder chamber and rotates only in a first direction; a drive sleeve disposed coaxially with the central axis in the holder chamber and rotates only in the first direction; a tool chip having a spherical surface at a distal end; and a chip holder penetrating the slide sleeve and the drive sleeve, reciprocable between a forward end and a rearward end, capable of mounting the tool chip at a distal end, axially slidable relative to the slide sleeve, and rotates in the first direction as the chip holder moves forward relative to the drive sleeve.

A cutting tool comprises a holder, a cutting insert, a sensor and a wiring member. The holder has a rod shape and comprises a front end surface, an upper surface, a lower surface, a first side surface, a second side surface and a pocket. A cutting insert is located in the pocket and comprises a cutting edge. The sensor is located on the outer surface on the side of the front end of the holder. The wiring member is electrically connected to the sensor and extends from the side of the sensor toward the rear end of the holder. The holder includes a groove that is open to both the lower surface and the second side surface and extends from the side of the front end toward the rear end. The wiring member is located in the groove.

A rotary cutting tool includes a tool body and a cutting edge tip provided at the tool body. At least one first groove is provided in a rake face of the cutting edge tip, the first groove has a portion inclined with respect to a rotation axis, and a front end of the first groove is provided at a front cutting edge. A rear end of the first groove is provided on an inner side with respect to an outer peripheral cutting edge, and an irregularity of the outer peripheral cutting edge is 30 m or less.