Gear wrench 9543 8-Piece reversible combination ratcheting wrench set - metric. Consisting of: 8, 10, 12, 13, 14, 15, 17, 19 millimeter reversible combination wrenches. Gear wrench surface drive Plus reduces fastener rounding; delivers up to 25 Percent more torque with open end wrench. ratcheting box-end needs as little as 5 degrees to move a fastener versus 30 degrees for standard box end wrenches. Compact reversing lever allows the change of direction with the flick of a thumb.