Kastar Latch-On 5-Piece 12-Point Ratcheting Box Wrench Set - Metric 5424 Built-in non-slip retaining ring in each ratchet wheel to create the ultimate in speed and safety when turning fasteners A nut can be tightened or loosened up to 5 times faster than with a conventional wrench or ratcheting wrench 7-8mm, 9-10mm, 11-12mm, 13-14mm and 15-17mm Exceeds GSA torque specification GG-W-001405 for torque capacity