A motor powered torque-limiting driver comprising: a cylindrical body having a fortified connector mount on one end and a nose cone at the other end, the cylindrical body containing an upper cylindrical shank having a face-to-floor crown gear around an axial bore; at least one pair of force buttressing ribs disposed on the fortified connector mount; a drive channel formed in the fortified connector mount with a square configuration having corners, the drive channel formed axial and centered in the fortified connector mount of a size to accept a tool or shaft; wherein said force buttressing ribs each have a bottom at a flat top of the fortified connector mount and each force buttressing rib has a support edge at the annular wall of the fortified connector mount; a drive shaft mounted in said drive channel; a lower cylindrical shank having a face-to-floor crown gear around a drive socket; a shaft having a tip a drive connection and a threading, with the drive connection engaged within the drive socket of the lower cylindrical shank, the shaft extending through the axial bore; a nut of a size and thread to mount on said threading; a spring between the upper cylindrical shank and nut, wherein the spring is configured to apply a force across the upper cylindrical shank and the lower cylindrical shank, wherein the spring is connected via the threading to the nut; wherein the upper cylindrical shank and the lower cylindrical shank engage for relative rotation when a motor applies rotational force to the drive shaft; and, wherein the upper cylindrical shank and the lower cylindrical shank disengage when a predetermined torque limit is exceeded. a cylindrical body having a fortified connector mount on one end and a nose cone at the other end, the cylindrical body containing an upper cylindrical shank having a face-to-floor crown gear around an axial bore; at least one pair of force buttressing ribs disposed on the fortified connector mount; a drive channel formed in the fortified connector mount with a square configuration having corners, the drive channel formed axial and centered in the fortified connector mount of a size to accept a tool or shaft; wherein said force buttressing ribs each have a bottom at a flat top of the fortified connector mount and each force buttressing rib has a support edge at the annular wall of the fortified connector mount; a drive shaft mounted in said drive channel; a lower cylindrical shank having a face-to-floor crown gear around a drive socket; a shaft having a tip a drive connection and a threading, with the drive connection engaged within the drive socket of the lower cylindrical shank, the shaft extending through the axial bore; a nut of a size and thread to mount on said threading; a spring between the upper cylindrical shank and nut, wherein the spring is configured to apply a force across the upper cylindrical shank and the lower cylindrical shank, wherein the spring is connected via the threading to the nut; wherein the upper cylindrical shank and the lower cylindrical shank engage for relative rotation when a motor applies rotational force to the drive shaft; and, wherein the upper cylindrical shank and the lower cylindrical shank disengage when a predetermined torque limit is exceeded.