Abstract: An apparatus for mounting and locking a keylocking insert in a threaded opening in a parent material includes a driver adapted for sequential mutual and relative rotation with the insert, drive means for rotationally driving the driver in response to a force applied thereto, and a press for operating the keys into a locking position. The driver has a threaded stud for threadably engaging interior threads of the insert to mount the insert in the parent material by threadably engaging the insert exterior thread with the threaded opening and advancing the external thread into the threaded opening in response to the mutual rotation of the driver. The press has a first end surface for engaging the keys of the insert and longitudinally moving toward the insert to operate the keys to the locking position in response to the relative rotation of the driver. The insert is thereby both mounted and locked by rotation of the driver.